About Nutramax
Nutramax Laboratories has been developing supplements for people and their pets since 1992, and its veterinary arm, Nutramax Laboratories Veterinary Sciences, is best known for Cosequin and Denamarin — joint and liver-support products that sit on the shelf in a very large share of US veterinary practices. That institutional footprint is unusual in a pet-supplement market otherwise crowded with newer, direct-to-consumer brands.
Its behavioral-health line, Solliquin, takes the same approach: rather than a generic botanical blend, the formula pairs L-theanine with magnolia and phellodendron extracts and a patented whey protein concentrate (NMXSLQ05), and the company publishes the mechanism behind each ingredient rather than leaving it unexplained. Solliquin is built as a non-sedating, daily-use supplement for cats and small dogs, aimed at ongoing background anxiety rather than a single stressful event.
Brand website: nutramaxlabs.com
What Nutramax makes
Nutramax's range runs wider than the products we review. The lines we know best from our own testing are marked with a star:
Cosequin
Joint-health supplements for dogs, cats, and horses, and the brand's best-known product line
Denamarin / Denosyl
Liver-support supplements widely used in veterinary practice
Solliquin
Non-sedating daily behavioral-health chews for cats and small dogs — featured on House of Mittens
Proviable
Probiotic and gut-health supplements for dogs and cats
Welactin
Omega-3 fatty acid supplements for skin and coat health
Why we recognized Nutramax
The House of Mittens Top Brand recognition isn't paid for and can't be applied for. We award it to the brands whose products consistently stand out in our vet-reviewed category guides. Nutramax earned it on the strength of the products below, evaluated the same way every product on this site is: assessed against feline-health criteria, used with real cats, and judged on merit.
Nutramax products we rated highly
Nutramax Solliquin Calming Support Soft Chews for Cats and Small Dogs, 75 Count
In our testing, this was the most seriously formulated daily option in the roundup: a patented combination of L-theanine, magnolia and phellodendron extracts, and a whey protein concentrate, rather than a generic botanical mix. It is explicitly non-sedating and built for daily use, which suits ongoing background anxiety, and at 75 chews per tub it supports the multi-week trial these supplements need before their effect can be judged fairly.
Read the 10 Best Cat Calming Treats of 2026, Vet-Reviewed guide →What earned Nutramax the recognition
- Backed by Nutramax Laboratories Veterinary Sciences, the maker of Cosequin and Denamarin, two supplement lines with an unusually long track record inside veterinary practices
- Solliquin's active combination is a patented, published formulation (L-theanine, magnolia and phellodendron extracts, whey protein concentrate) rather than an unexplained proprietary blend
- Formulated as non-sedating and intended for daily use, positioning it for ongoing background anxiety rather than one-off situational stress
- A 75-count pack size supports the two-to-four week trial period needed to fairly judge a calming supplement's effect