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Vetoquinol

Vetoquinol Zylkene Calming Capsules Small Cats & Dogs 30 Count

  • 30 capsules per bottle
  • 75 mg hydrolyzed milk protein per capsule, providing alpha-casozepine
  • Small cats and dogs, 11 to 22 lb
  • Non-drowsy and lactose-free per the product title
  • Milk flavor oral capsule

Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A calming capsule for small cats and dogs facing occasional stress such as vet visits or storms. Directions are not given, so dosing needs the label or a vet.

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ASIN: B07S5KTWLQCategory: Pet Calming Aids

Overview

A pet owner facing a vet visit, a move or a thunderstorm gets a calming capsule built on hydrolyzed milk protein, the source of alpha-casozepine. It is sized for small animals and aimed at occasional anxiety and behavior concerns.

A capsule gives a measured, repeatable dose that is not a sedative, since the title calls it non-drowsy. Its limit is the narrow weight band, so larger animals are outside what the listing covers.

Who it's for

Owners of small pets who can predict a stressful event, such as a move, a vet trip or fireworks, and want to plan ahead. Larger animals fall outside the weight band in the title, and chronic anxiety calls for a vet's guidance rather than an occasional capsule.

Pros and cons

Pros
  • Active ingredient clearly stated
  • Non-drowsy and lactose-free per title
  • Covers cats and dogs
  • Thunderstorm and moving use listed
Cons
  • Directions not listed
  • Limited to small animals
  • Single capsule strength only

Performance notes

The active ingredient is hydrolyzed milk protein, which supplies alpha-casozepine, the compound the maker names for calming. Capsules work as a planned dose, so timing relative to the stressful event matters more than any single capsule. No onset time or schedule is stated.

Specifications

BrandVetoquinol
Dimensions & fit
Dog Breed SizeSmall
Minimum Weight Recommendation11 to 22 pounds
Included components
Unit Count30 capsules
Other details
Product BenefitsAnxiety relief, promotes relaxation, reduces stress
Item FormCapsule
Target SpeciesDog and cat
FlavorMilk
Specific Uses For ProductAnxiety, moving, stress, thunderstorms
Active IngredientsHydrolyzed milk protein (bovine), 75 mg, providing alpha-casozepine

Frequently asked questions

How do I give Vetoquinol Zylkene capsules to a small cat or dog?

The listing gives no directions, only that it is an oral capsule. Follow the label dosing for the pet's weight and ask a vet, especially at the edges of the weight range in the title.

Can a large dog take Zylkene?

The title limits it to small cats and dogs weighing about 11 to 22 lb, and the breed size is listed as small. Larger dogs are not covered by this listing.

Will Zylkene make my pet drowsy?

The title describes it as non-drowsy. It is a calming aid, not a sedative.

What is in each Zylkene capsule?

Hydrolyzed milk protein from bovine milk, 75 mg, providing alpha-casozepine. The title also says it is lactose-free.