Although our pets cannot tell us how they feel, we may sometimes notice some changes in their behaviour.

A dog that loses its playfulness, exhibits self-biting and excessive licking of its feet and destroys the furniture, or a cat that relieves itself indoors clearly are not feeling well. However, you can help them cope with their living conditions and tricky changes.

Vetoquinol has taken an interest in the welfare of pets and their ability to calmly adapt to unforeseen situations.


Zylkene® is a natural and patented dietary supplement derived from a milk protein,  a unique blend of alpha-casozepine, vitamins, minerals and nutrients which helps dogs and cats to deal with unusual situations that can upset them.


Warning: these web pages are intended for French-speaking users, excluding users based on French territory. To access information for French residents, please visit the dedicated website:

These pages are general information pages of the Vetoquinol Group. Products ranges are tailored to accommodate local demand and regulatory requirements which may change from one country to the next. For further information about the products in accordance with applicable national regulations, please refer to the Vetoquinol website for your country. The information provided depends on national registrations. The technical information is only accessible to authorised persons.