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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
  • All Lifestages
  • All Breeds
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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
408 Ratings
Terms & Conditions

Customers Mention

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

Ease of Use

82% Positive

Effectiveness

75% Positive

Ingredients

82% Positive

Long-Term Benefits

81% Positive

141 Customer Reviews

Rated 5 out of 5 stars
By Maggie on Jan 29, 2026

Ability to add an item.

Thanks for letting me add an item to this order. My senior gal has lost a lot of hair lately. She hates shirts and sweaters, so the vet recommended melatonin as

Thanks for letting me add an item to this order. My senior gal has lost a lot of hair lately. She hates shirts and sweaters, so the vet recommended melatonin as it can help with hair re-growth. Best part is, I don’t have to wrap the pill in cheese or peanut butter, she will take it plain. Fingers crossed she gets some new hair, these Iowa winters are brutal!

Rated 5 out of 5 stars
By Patricia on Jan 1, 2025

Melatonin helpful

I purchased this product for my 14 yr. Old because she is showing signs of dementia . After the Vet did some blood work and check up . She does not have any health

I purchased this product for my 14 yr. Old because she is showing signs of dementia . After the Vet did some blood work and check up . She does not have any health issues . I get my dog one tablet at 10 pm every night . My dog stopped pacing and vocalizing during the night hours . Now I’m not woken up at 3 am . Try this product , it really helped .

Rated 5 out of 5 stars
By Dfwgolden on Mar 8, 2025
Top 500 Contributor

Love the taste and has helped hair growth

I have Italian greyhounds unfortunately, this particular breed is prone to conditions that can affect their coat quality, including a couple of different forms of

I have Italian greyhounds unfortunately, this particular breed is prone to conditions that can affect their coat quality, including a couple of different forms of alopecia. Funny enough, one of the treatments for certain types of alopecia is melatonin supplements. I decided to try this particular melatonin supplement paired with a few other coat care supplements for my Italian greyhound. He was experiencing significant thinning down his back. He is at the prime age for developing certain types of alopecia so this was more of a preventative measure. He has not been formally diagnosed with anything. I will say since starting the product paired with the other skin coat supplements, I have seen a drastic improvement in his overall coat quality. The thinness is dissipating and while it’s definitely not like it was when he was younger it is definitely better than what it was a few months ago. This product has been very well received taste Wise. He takes one in the morning and one at night the one in the morning I just give it to him like his morning treat and the one at night just goes in his dinner. Absolutely zero fuss. And he’s excited about it. This particular breed is prone to some anxious traits as well, and while he himself is not overly anxious, I have noticed a positive improvement in his overall demeanor him just being a little bit more relaxed and a bit less reactive to things that would typically cause him to become reactive. He also sleeps through the night better than he did before. Usually, he would get up a couple of times, but now once he goes down for the night, he does not get up. I know some people have expressed concerns about some of the additives in this particular product. I personally have not had any side effects with my dog. As of right now, I plan to continue the product and have been very happy with it

Rated 5 out of 5 stars
By Deninne on Jan 21, 2026

Melatonin for dogs was excellent for my dog with Cushions disease

Melatonin worked absolutely great for my dog with Cushions disease. Dogs with this disease, usually have trouble sleeping, but I noticed a big improvement withmy

Melatonin worked absolutely great for my dog with Cushions disease. Dogs with this disease, usually have trouble sleeping, but I noticed a big improvement withmy dog Otis!

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 1 out of 5 stars
By Florencia on Jan 24, 2026

Did not eat it

My dog will eat just about anything, and yet, he will not eat these chews/pills. I even try dissolving it in water and give it with a syringe, and after 20 minutes

My dog will eat just about anything, and yet, he will not eat these chews/pills. I even try dissolving it in water and give it with a syringe, and after 20 minutes in water, it would not dissolve. I am leaving this review for others to learn from my experience and just go buy regular melatonin at the store and hide in in food, since that's what I will have to to with these pills. And I can assure you, my dog is not picky AT ALL. I do want to say something about the issue of "does it work?" -- Read the reviews carefully and fully: if people are buying it thinking it will be a sedative for stressful events like going to the vet or trimming nails, most likely, they will say it doesn't work. Now, for people who have geriatric dogs who are struggling to settle down at night and need some improvement in the quality of sleep, then yes, after taking it nightly for a few weeks, you will see some improvement. But again, it's not a sedative that will make the dog sleep through anything. Also, it's not a replacement for activity and enrichment. If a dog is bored or anxious because of lack of mental & physical stimulation, this won't make them magically calm down and sleep all day. And same as people: it works better for some dogs than for others. You have to give it 2 weeks before coming to conclusions. I do appreciate that these chews have 3 mg of melatonin, which is not easy to find in most calming chews (many have a fraction of it).

Rated 4 out of 5 stars
By anna on May 3, 2025

She likes the flavor

I bought it because my Pomeranian has alopecia and has a lot of anxiety. She seems to like the beef flavor and I have some improvement in your behavior but it will

I bought it because my Pomeranian has alopecia and has a lot of anxiety. She seems to like the beef flavor and I have some improvement in your behavior but it will take some time to see if her hair will grow back.

Rated 1 out of 5 stars
By Ginger on Jan 13, 2025

Ingredient

I always read ingredients before giving anything to our dogs. I was looking at Melatonin for our newest puppy as she's very hyper sometimes. I thought about giving

I always read ingredients before giving anything to our dogs. I was looking at Melatonin for our newest puppy as she's very hyper sometimes. I thought about giving her "people" melatonin but when I looked up the first ingredient, this is what it said "Dicalcium phosphate can cause digestive issues, such as constipation or diarrhea, and may lead to kidney problems in dogs with pre-existing conditions. Warnings: Avoid dog foods that contain dicalcium phosphate as it is an unhealthy ingredient that provides no nutritional value to dogs" Could someome please advise on this as this is one of the ingredients on this product. Thank you.

Rated 5 out of 5 stars
By Kim on Jul 25, 2024

Calming agent

My 2 doxies are bad with fireworks or even loud thunder. A friend recommended this melatonin, and my dogs were more relaxed and not very stressed out or high anxiety

My 2 doxies are bad with fireworks or even loud thunder. A friend recommended this melatonin, and my dogs were more relaxed and not very stressed out or high anxiety for Fourth of July. I was impressed with how easy it was for my dog to take it, I didn’t have to hide it in something.

Rated 5 out of 5 stars
By Susan on Jul 14, 2025

Calming my elder dog

After much research, I ordered this melatonin product from Chewy. My elderly dog started panting and pacing at night and nothing could calm her down. She's already

After much research, I ordered this melatonin product from Chewy. My elderly dog started panting and pacing at night and nothing could calm her down. She's already on anti inflammatory medication for arthritis. This melatonin really helps her sleep at night without discomfort. Definitely recommend.