K9 Select Melatonin Beef Flavor Calming Dog Supplement, 3-mg, 120 count

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At a Glance

  • Vitamins & Minerals
  • Calming
  • Immune Support
  • Skin & Coat Health
  • Made in USA
  • All Lifestages
  • All Breeds
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$18.99 List Price
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About This Item

Details

  • Made with melatonin, these supplements offer natural support for adrenal glands, reducing excess stress and helping support a healthy hormone balance.
  • Melatonin works in humans and dogs to regulate the sleep-wake cycle which is why an extra dose of melatonin can help with relaxation, sleep, tension, and dog separation anxiety.
  • These supplements feature anti-inflammatory, and powerful antioxidant effects that may increase the strength of your dog’s immune system.
  • Supplementing with melatonin can be highly beneficial as it provides adrenal support, promotes healthy levels of cortisol, and normal thirst and urination.
  • Melatonin is great to relax your dog before fireworks, a party, travel, vet visits, grooming, or leaving the house!

Ingredient Information

Instructions

Frequently bought together

Questions & Answers

5 Customer Questions

Does this contain xylitol?

Answer by Chewy • Jul 21, 2023
For a complete list of ingredients and guaranteed analysis, click the “Nutritional Info” tab, just under the product photos when viewed on a desktop. Click the "Nutritional Info" tab, next to the "Q&A" tab, towards the top bar above the product image when viewed on the app.

Does this have the NASC seal?

Answer by Chewy • Nov 14, 2025
This product does not contain a NASC seal.

Can these be crushed and sprinkled into food?

Answer by Chewy • Jan 27, 2025
This supplement can be crushed and sprinkled into food.

What are the pill dimensions?

Answer by Chewy • Jun 29, 2024
The dimensions are 2.4 x 2.4 x 4 inches.
Reviews
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4.4
Rated 4.4 out of 5 stars
346 Ratings
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Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Ease of Use

85% Positive

Effectiveness

75% Positive

Ingredients

81% Positive

Long-Term Benefits

83% Positive

123 Customer Reviews

Rated 5 out of 5 stars
By JENN on Dec 26, 2025

Helpful!

My dog eats it up no problem. I grind it up and add it to her food. She was noticeably drowsy and ready for nap time after about 2 hours. She was experiencing symmetrical

My dog eats it up no problem. I grind it up and add it to her food. She was noticeably drowsy and ready for nap time after about 2 hours. She was experiencing symmetrical hair loss since I had to stop the last brand and she’s getting nice and fluffy again :)

Rated 5 out of 5 stars
By LauretLDewolf on Dec 22, 2025

My dog devours these.

This works to calm my dog without making him dopey. Just enough so I can engage him with his training.

This works to calm my dog without making him dopey. Just enough so I can engage him with his training.

Rated 5 out of 5 stars
By Shannon on Sep 9, 2025

Wonderful!!

This is a miracle for me! My dog is on Prozac, and in addition I've tried anti-anxiety prescription drugs and hemp products with nothing working for his hyperactivity,

This is a miracle for me! My dog is on Prozac, and in addition I've tried anti-anxiety prescription drugs and hemp products with nothing working for his hyperactivity, hyper-anxiety, but this melatonin works amazingly!!! I give him 2, per the instructions, and he becomes the best dog!!! I'm so thankful for this product!

Rated 5 out of 5 stars
By Di on Oct 14, 2025

Works

These really help to calm her down from her anxiety. Helps her sleep through the night. I give two when I have to leave her home alone. And one at night. So

These really help to calm her down from her anxiety. Helps her sleep through the night. I give two when I have to leave her home alone. And one at night. So far they've been working.

Rated 5 out of 5 stars
By kathy on Dec 7, 2025

Vet recommend because it's all natural better for him at his age

It helps him settle & sleep. Sometimes I give him a second one if he's having a bad night

It helps him settle & sleep. Sometimes I give him a second one if he's having a bad night

Rated 5 out of 5 stars
By Carrie on Aug 27, 2025

This works for my elderly dog

My dog is 16 1/2, and suffering from canine dementia, and nights have been so HARD for the past year with her waking every few hours. In desperation we tried this,

My dog is 16 1/2, and suffering from canine dementia, and nights have been so HARD for the past year with her waking every few hours. In desperation we tried this, and within two nights of taking it she was sleeping through the night. She seems like a whole new pup. We are no longer keeping newborn hours with our old girl. I’ll be purchasing this again and again.

Rated 2 out of 5 stars
By Carol on Oct 6, 2025

These don't work as hoped

Both of our corgis were not relaxed anytime within 2-6 hours after taking the recommended dosage, didn't even get drowsy, but rather were less sleepy than they are

Both of our corgis were not relaxed anytime within 2-6 hours after taking the recommended dosage, didn't even get drowsy, but rather were less sleepy than they are normally.

Rated 2 out of 5 stars
By Donna on Jan 16, 2026

Hyper puppy

I Only Used 1x. Im Not Sure If This Purchased Helped Rascal.

I Only Used 1x. Im Not Sure If This Purchased Helped Rascal.

Rated 5 out of 5 stars
By Jeff on Dec 15, 2025

Great product

This is a great product to help your dog with anxiety and help relax and sleep

This is a great product to help your dog with anxiety and help relax and sleep

Rated 5 out of 5 stars
By Stevie on Jul 7, 2025

Works for us

I live with 4 dogs, 2 being my own (chihuahuas), 2 being my sisters(dachshund mix and husky lab mix) They all love these and will actually get excited to have one!

I live with 4 dogs, 2 being my own (chihuahuas), 2 being my sisters(dachshund mix and husky lab mix) They all love these and will actually get excited to have one! My sister's 80 pound husky lab mix is VERY vocal. We live in an apartment so its been hard to keep him from being too loud. We give him 3 to calm him down. Ive definitely noticed he will eventually just lay down and watch us, instead of barking and talking to us constantly. Will definitely be buying more!!