Easy to emit a tone, but indoors people can hear the whistle between floors of the home. Not a deal breaker and the first time my dog heard it he jumped from a sleep barking as if the UPS truck was coming up to the door. I am using it for recall when I do not have an e-collar and hope to transition to use it with the collar to signal him to change directions. I wanted a whistle that is adjustable and unique from others in the field. This will do the trick.

Looks like this whistle is well made, it just doesn’t work for me. It is not silent. Dogs don’t seem to respond to it. It was pretty expensive.

Not the cheap unit seen all over Amazon. This is a well manufactured whistle that's easy to use.

I've used silent whistles for my dogs for decades now and, although I've never owned one that I'd complain about, this one is by far the best.

I like the quiet whistle and my rottie responds to it very well... until it stopped working. I've cleaned it and soaked it (in case any air passages are blocked) but it still won't work. Considering the cost... what else can I do to get it working again?

I think the whistle works well. It sure is good quality.

Works well…. My dog responds to it very well. I bought 2 and gave one to a friend.

Honesty is the best polacy ! Good on yah !

So far so good. Not too obnoxious and gives me range for my GSP to cue off of. Needed to attach a proper lanyard though.

This whistle replaces my orange school yard type whistle which can blow a humans ears out. I love that the dogs instantly respond to it and even I can hear most of the frequencies without hurting my ears. Now we move on to using the same commands from the loud whistle to this quiet version.

I have not been able to have my dog hear the silent whistle when he is loudly barking at the delivery people

I bought this for training our dog and it works great. I had originally purchased a cheaper one, but our dog barely acknowledged it. This one gets his attention every time! It’s very well made and worth the extra expense.

Solid, easy to set

Really good experience with this product. The puppy hears this whistle and it diverts his attention to me from even the most distractive activities. It has helped me with training him to respond to commands.

I use this whistle because my GSPs seem to respond much better than to other whistles I have tried. When my dogs are out at one or two hundred yards they respond and I don’t put up with the uncomfortably loud sound necessary with other whistles.

This is the first dog whistle that works. Quality construction.

This was exactly what I was looking for. I have Malamutes - obedience is at best a negotiated experience with this breed. I have a pair of littermates which is an even greater challenge because they are bonded as tightly to each other as to their human pack. They’re really good outside the fence as long as they are harnessed and on leads, but if they slip their leads, off they run with ears tightly closed to any and all words that come out of our mouths. My son was shopping in Cabela’s one day, saw a dog whistle, and thought that would be worth trying out. We tried getting them to come using three blasts of the whistle followed by a treat when they showed up and it worked beautifully. Then the whistle rolled off the table and got sucked into the vacuum. It wasn’t the greatest whistle and didn’t adjust for squat, so I went hunting for a good, durable whistle that I could adjust to the perfect frequency for our two wooly adventurers. This whistle is perfect. It’s one of the only ones I’ve tried that goes high enough to be pretty much silent - the frequency that catches my dogs’ attention best. I like the cover which, contrary to many reviews I’ve seen, is easy to pull off and put on. It’s also really solid which just adds to its feel and durability. The dogs actually got hold of it once and took it out to the yard. All it needed was a quick wipe down and it was good as new (they had already eaten up two other whistles that were plastic and one that was metal but not sturdy). They can be outside enjoying the yard, upstairs snooping in wastebaskets, or even all the way up in the attic snoozing in a sunny window, but, when I give three blasts on the whistle, they come running. We’ve got them pretty consistent within back yard and home and are going to move to dog park training. Hoping that gets consistent enough that we can attempt free walking outside the house so that we can count on them stopping and returning if they slip away from us. Anyway, I’m really happy with this whistle - solid, adjustable, consistent (not all whistles are), and can be attached to a lanyard to wear around your neck with outside.

I really like this Acme Silent Dog Whistle - #535. I like the fact, too, that it has its own cover. I am training my sometimes stubborn 9-month old German Shorthaired Pointer to come to this whistle. My GSP reacts and comes!

Product was quality, and just what it said it was .Had a little trouble with screw for tone adjustment but all around good product. I just made the wrong choice for my dog, she doesn't like it. I have been using a whistle with a pea and wanted something without. Will try another style.

My shorthair pointer responds way better to this whistle then any other I have used. Even in the wind or long distance she hears it and responds to it. Very good results.

This a terrific dog whistle! Adjustable pitch and excellent range makes it useful every time I take my two rowdy young dogs to the 10-acre woods in our favorite dog park. It even worked at a distance calling them back from chasing deer, which is very impressive.

I like it but it's not foolproof. Sometimes it takes the dog a while to respond.

Works like a charm without disturbing my neighbors. She comes when called and obeys other commands, after having been trained to the commands, of course. she actually seems to respond to the higher pitch better than the regular whistle.

My Dog responds perfectly to this whistle. I am happy with it. This my third replacement. I am having this one engraved so if found, it can be returned.

Very pleased with both whistles I ordered. Would recommend them.

The whistle works wonderfully well, but the secret is Steve's instruction for training dog and owner how to use it. It is not magic but if you do what Steve says, it works.

The whistle works wonderfully well, but the secret is Steve's instruction for training dog and owner how to use it. It is not magic, but if you do what Steve says, it works.

I love it. My pup has started to comply.

Just got it. Still a work in progress. A puppy, she responds most of the time, till distracted.

In my opinion, this is a well-made, high quality whistle. I use it to call my cat and it stimulates a response better than my voice. I had trouble removing the cap as I have parts of fingers missing on my left hand. I discovered that removing the chain solved the problem. The chain is just a little too short to allow the amount of pressure needed to remove the cap. Getting a lanyard would be a good replacement for the chain. This whistle is by far superior to the one I bought at a large chain store that never worked at all.

Very good quality!

I can't seem to get my dogs to hear it! Information on web site said that a person could only hear air passing through the whistle. However, once I tightened the screw to set the whistle for long distance and tone, it began to have a high pitch whistle, but the dogs don't seem to hear it. I will keep trying to get them to respond to this silent whistle.

Hard to hunt with.

Seems to work well with the dogs. Took some extra training with them to respond consistently. Don't like the small mouthpiece, makes it hard to hold in your mouth and blow when you are working with the dogs. It takes some getting used to to make it work. I use it in the field to make my dogs quarter in front.

Expensive, but incredibly well made. Skip the one made in the far east and buy the original. Been using them for 40 years, and it's still the best.

Well made, but a little less comfortable to use than the Acme plastic whistles. We are testing higher frequencies for longest distance.

Much more solid construction than others I've looked at. Easy to blow. Adjustable frequency. And, best of all, my dog responds from at least 100 yards away.

I had a little problem removing the cover on the whistle, but now have the little problem solved. It works great! Thanks

I'm still at the very beginning of training with it. Puppy is not quite 16 weeks yet. He is blind, though, and I feel this will be an excellent training tool, especially when there is a great deal of peripheral noise that is confusing to him.

Made of good quality materials. The chain feels solid. The adjustable pitch is very easy to change. It always gets the attention of my dogs, and they were quick to realize what it meant.

It is an amazing product. I love it!! Used it for my hound. Works amazing!

Works with our dog out to about 100 yards. I think beyond that the background noise from a highway distracts the dog. Also our dog is barely 2 years old and I think she ignores the whistle when she is on the trail of some critter. I think I may need to get a training collar to increase the distance for alerting the dog.

All I can say is IT'S GREAT!

Best whistle on the market, silent or ear buster.

I had used just a regular whistle, but needed something that didn't hurt my ears and had more distance. The dogs are responding to the silent whistle after some training.

Finally got my answer from brazil where I forwarded it to my brother in law, and he said the dogs look toward him and hesitate, but he blows it some more, and they quit. They also do not bark so early or so late. He is slowly but surely training them. Should say also that they are neighbors dogs who have been keeping him up for months. He thanks you for his nights sleep.

The first truly (nearly) silent whistle I've found. Excellent.

I thought this would be nice so that I would not bother people around me, but so far the GSP does not respond to this for a recall. I may not have it adjusted right. I used the 3rd place for distance. I also have the Acme Tornado 635, and the dog does respond to this if not to far away. However, Steve's pick, the small Thunderer works the best.

Acme is the original and no one has done it better since. Love 'em.

We LOVE this whistle. I like it so much that I purchased a 2nd just to have in case we misplace one. Our GSP is 2.5yr and responds very well to the whistle. We use it for recall at the park and off leash activities. Great product, durable and easy to adjust the pitch. Definitely recommend.

It did not work for silencing a barking dog next door. I thought I had read the comments online that it would be effective for this purpose. I received a response from your company that it is not for that. I don't have any of my paperwork to return it, so it's really of no use to me. Sincerely, Linda Griffin

Hasn't worked yet.

I was very pleasantly surprised by the obvious quality of the Acme Dog Whistle. It has good weight to it and is just the right size to fit in the hand. The chain is a very nice feature. I don't have to worry about losing half of the whistle. I've used other silent whistles in the past and this one is by far the best. It's well worth the money!

Trained my dogs from the beginning with it. Works great and you don't have to annoy every other hunter within a mile!

Works well in training. Still need to try under actual working conditions.

It is the best.

Just bought another as a gift for my daughter to use to train their new dog - a Lab/Dane mix. She was impressed when she saw my Husky turn and come back to us upon hearing my whistle signal.

Very good whistle! Worth the money. Can't find anything better.

Works great. She is now two months and responds well when I pip the whistle. Started with a short leash, and she would come for a treat. Gradually going to work her up to coming to me with no leash at all!

Works well and seems to have good range. The only negatives are the shiny finish and the adjustment has a mind of its own, so you constantly have to check it.

Very effective whistle. I mean your dog will ALWAYS respond to it every time you use it. I thought it was over rated, but was I wrong. Just get one, and you'll see.

I am a trainer specializing in Service Dogs and encourage clients to use this style of whistle for recall, runaways, especially disabled handlers that need a foolproof recall method. They are invaluable, and clients swear by the whistles after the dog is properly trained to respond. They save lives! However, due to how much an average client will spend, I needed to offer a cheaper knock-off of the Acme whistle I extensively hunted for just so I could have a $10 whistle, and clients would get something in hand, that works, and use it. Then maybe later, they'll step up to a real Acme Silent Dog Whistle. Business has been awesome, so I decided to treat myself and bought two Acme Silent Dog Whistles, one to replace the knock-off I wear on my neck, and the other on my key-chain. WOW!!! What a beautiful whistle! Well made! The design is excellent including the set-screw to lock the whistle together so you don't loose the bottom half after you adjust the frequency, and the range of high quality frequencies available by this whistle is fantastic! I will buy a few more of these to have on hand to able to able to offer to my clients interested in a classier high-quality option for a whistle, and now I can demonstrate the awesome differences.

Am amazed how well it works. It only took two days to train my dogs to come upon whistle command. Highly recommended.

A work in progress. My dog responds to it very well, unless she is significantly preoccupied. Then continual blasts usually get her attention. I totally like the way it is designed and crafted. Will see next winter when my lips are cold if I can pucker up enough to make it work.

Wonderful product! Good quality and effect, as expected.

Really works.

My 13 yr old Daisy is going deaf. The whistle is great for getting her attention; she is already learning to come when she hears it. You can teach an old dog new tricks.

Excellent. It works very well. The dog pays attention. When I bought it I had a second thought, but today that I have it works. Thank you

I'm not sure there is a need for the cover piece which is attached by chain. It does get in the way at times. The entire assembly is beautifully finished. It really gets the attention of my two Labs who are "selectively deaf" to a conventional whistle much of the time.

Pros: It doesn't make my ears ring like my old Roy Gonia. It doesn't disturb the neighbors, and my pup definitely hears it. I keep it set on the lowest frequency, so I can still hear it when I give sloppy commands. Cons: Whistle is very narrow and heavy for its size, so it is difficult to hold between my teeth for extended periods. This is problematic since I never take it out of my mouth during a training session. I detached the cover because it was in the way; served little function and added a lot of weight. I also slid two layers of surgical tubing over the mouthpiece. This increased the diameter which made it easier to hold, but the mouthpiece is still very short, and my lower lip has a tendency to block the air slot on top if the mouthpiece rotates in my mouth. This muddies up my commands. Due to the round shape it is difficult to keep the air slot on top. Conclusion: It performs as advertised, but the ergonomics are problematic for my purposes. I'd be better off with a quiet, single tone like the Acme Sonec.

How about a break on the Acme. I have ordered 4 already and plan on ordering 5 more this time. Best product ever. I have been using it in working with my SAR Malinois!

Was easy to train dogs to whistle. Use it to change direction while hunting with dogs. Reduces unnecessary noise when bird hunting.

Great whistle of a very high quality.

Could never keep the proper adjustment for my dog to hear it consistently. Also, the ring pulled out in the brush and I lost it. The Acme 211 1/4 works great, but I desire a silent whistle.

Have used this whistle since the mid 1950's to train my dogs. I have not used any other whistle. Still have the original whistle.