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Unusual situations or changes to your pet's environment can sometimes cause behavioral problems or lead to physical issues. Zylkene is a behavior supplement that helps dogs and cats relax, adapt to new locations, or cope with challenging situations — without making them drowsy.

Zylkene highlights

  • Clinically proven for behavior problem management with minimal side effects. No sedation or change in personality!
  • It's the only veterinary behavior supplement formulated with soothing alpha-casozepine
  • Zylkene helps pets cope with a variety of short-term and long-term situations: traveling, thunderstorms, fireworks, vet visits, a new baby, new home, kenneling, adoption, grooming, and meeting new people
  • It increases your pet’s receptivity to behavior modification training
  • Zylkene's vegetable capsules are well-accepted by both cats and dogs for convenient, once-a-day administration
  • Capsules can be given whole or opened at meal time
  • Flexible for short- or long-term use

Also view Pro-Pectalin™, our supplement that soothes upset stomachs, maintains proper gut pH, and helps reduce occassional loose stools.


Capsules can be administered orally as a single dose, whole or opened at meal time. Use as recommended by your veterinarian. Short-term use: Use Zylkene for 1–2 days before a planned event or change in environment. Some animals may need earlier administration (5–7 days).


Alpha-S1 tryptic casein, commonly known as alpha-casozepine, a unique, mik-derived ingredient 


  • 14-count waiting room pack, 30-count bottle, and 120-count bottle
  • 75 mg, 225 mg, or 450 mg

Consult your veterinarian before giving your pet Zylkene. Follow the recommended administration on the package, unless otherwise instructed by your veterinarian.


Tips & Tricks

Zylkene 14-count blister packs
Zylkene 120-count bottles
Zylkene 30-count bottles


  • Help restore balance and harmony in your home with Zylkene, an all-natural nutritional supplement with calming benefits for dogs and cats.