VetriScience Laboratories Vetri Lysine Plus Immune Support Soft Chews
Vetri Lysine Plus is a lysine-focused soft chew designed for upper-respiratory and immune support in cats, making it a best-in-class targeted option within the Immune and Antioxidant Functional Support Treats for Cats category. Compared with broader multivitamins on this list, its technical advantage is a focused antiviral-support ingredient (lysine) in a palatable chew format, often making it a cost-effective choice for owners who want a single-purpose, veterinarian-formulated immune adjunct.
Upper-respiratory support
Lysine chews
Upper-respiratory support
Lysine chews
Review Summary
"Most long-term users find these tasty soft chews easy to give and report fewer upper-respiratory flare-ups; a minority report no noticeable effect. Overall palatability and ease of dosing are frequently praised."
Flavor cats crave
L-lysine–based soft chews designed to support feline upper respiratory viral control and immune response.
Flavor cats crave
L-lysine–based soft chews designed to support feline upper respiratory viral control and immune response.
Self-Improvement & Personal Growth
Vetri Lysine Plus is a lysine-focused soft chew designed for upper-respiratory and immune support in cats, making it a best-in-class targeted option within the Immune and Antioxidant Functional Support Treats for Cats category. Compared with broader multivitamins on this list, its technical advantage is a focused antiviral-support ingredient (lysine) in a palatable chew format, often making it a cost-effective choice for owners who want a single-purpose, veterinarian-formulated immune adjunct.
Upper-respiratory support
Lysine chews
Flavor cats crave
L-lysine–based soft chews designed to support feline upper respiratory viral control and immune response.
Palatable, chewable treat format for easy daily administration and good acceptance by most cats.
Upper-respiratory support
Lysine chews
Flavor cats crave
L-lysine–based soft chews designed to support feline upper respiratory viral control and immune response.
Palatable, chewable treat format for easy daily administration and good acceptance by most cats.
$20-30 CAD
Pet Naturals Daily Best for Cats
Pet Naturals Daily Best is a value-oriented daily multivitamin chew that delivers broad antioxidant and immune-support nutrients for regular use in cats, positioning it as the market leader for routine, budget-conscious maintenance. Versus the targeted products here (like Vetri Lysine and Nutramax probiotics), its financial advantage is lower per-day cost and wider nutrient coverage, making it a practical base layer of immune and antioxidant support for cat owners seeking everyday supplementation.
Daily multivitamin
Antioxidant blend
Daily multivitamin
Antioxidant blend
Review Summary
"Buyers commonly report this daily multivitamin improved coat condition and energy for many cats and is convenient to administer, though some cats are picky or show no change. Overall sentiment is positive but mixed for selective eaters."
Pill-free yum
Complete daily multivitamin chew providing essential vitamins, minerals and antioxidant support for cats.
Pill-free yum
Complete daily multivitamin chew providing essential vitamins, minerals and antioxidant support for cats.
Self-Improvement & Personal Growth
Recreational Enjoyment
Pet Naturals Daily Best is a value-oriented daily multivitamin chew that delivers broad antioxidant and immune-support nutrients for regular use in cats, positioning it as the market leader for routine, budget-conscious maintenance. Versus the targeted products here (like Vetri Lysine and Nutramax probiotics), its financial advantage is lower per-day cost and wider nutrient coverage, making it a practical base layer of immune and antioxidant support for cat owners seeking everyday supplementation.
Daily multivitamin
Antioxidant blend
Pill-free yum
Complete daily multivitamin chew providing essential vitamins, minerals and antioxidant support for cats.
Convenient treat-style tablets for everyday use to help maintain overall health and immune resilience.
Daily multivitamin
Antioxidant blend
Pill-free yum
Complete daily multivitamin chew providing essential vitamins, minerals and antioxidant support for cats.
Convenient treat-style tablets for everyday use to help maintain overall health and immune resilience.
$18-28 CAD
Zesty Paws Immune Support Bites for Cats
Zesty Paws Immune Support Bites combine contemporary functional ingredients such as colostrum, beta-glucans and antioxidant vitamins into tasty bite-sized treats, earning a top spot for ingredient-forward immune modulation in the Immune and Antioxidant Functional Support Treats for Cats space. Compared with simpler formulas like Vetri Lysine or multis like Pet Naturals, Zesty Paws’ technical advantage is its proprietary, premium ingredient blend and palatability—often at a higher price point but offering a more comprehensive, targeted immune-support profile.
Antioxidant-rich formula
Immune vitality boost
Antioxidant-rich formula
Immune vitality boost
Review Summary
"Owners like the palatable bite format and many note fewer infections and perceived immune boosts over time, but clinical results vary and some see little benefit. Taste and ease-of-use are frequent positives."
Zesty snack allure
Immune-support bites formulated with antioxidant vitamins and supportive nutrients to help combat oxidative stress.
Zesty snack allure
Immune-support bites formulated with antioxidant vitamins and supportive nutrients to help combat oxidative stress.
Self-Improvement & Personal Growth
Recreational Enjoyment
Zesty Paws Immune Support Bites combine contemporary functional ingredients such as colostrum, beta-glucans and antioxidant vitamins into tasty bite-sized treats, earning a top spot for ingredient-forward immune modulation in the Immune and Antioxidant Functional Support Treats for Cats space. Compared with simpler formulas like Vetri Lysine or multis like Pet Naturals, Zesty Paws’ technical advantage is its proprietary, premium ingredient blend and palatability—often at a higher price point but offering a more comprehensive, targeted immune-support profile.
Antioxidant-rich formula
Immune vitality boost
Zesty snack allure
Immune-support bites formulated with antioxidant vitamins and supportive nutrients to help combat oxidative stress.
Soft, tasty bite format aimed at high palatability for finicky cats.
Antioxidant-rich formula
Immune vitality boost
Zesty snack allure
Immune-support bites formulated with antioxidant vitamins and supportive nutrients to help combat oxidative stress.
Soft, tasty bite format aimed at high palatability for finicky cats.
$18-30 CAD
NaturVet VitaPet Senior Daily Vitamins Plus Glucosamine
NaturVet VitaPet Senior pairs antioxidant and immune-support vitamins with glucosamine to address both aging-joint needs and oxidative stress, making it a leading choice for older cats that require combined joint and immune care. Its unique market position versus the other products is the dual-purpose formulation that can save owners money compared with buying separate joint and immune supplements, though it is less focused solely on immune modulation than specialized options like Nutramax probiotics or Vetri Lysine.
Joint mobility support
Age-targeted antioxidants
Joint mobility support
Age-targeted antioxidants
Review Summary
"Many long-term users report improved mobility and comfort in senior cats and find the supplement straightforward to give, while a portion see minimal change or have trouble with acceptance. Effectiveness for joints is often praised but not universal."
Senior-friendly chew
Senior-focused chewable vitamins combining joint-support ingredients (glucosamine) with vitamins and antioxidants.
Senior-friendly chew
Senior-focused chewable vitamins combining joint-support ingredients (glucosamine) with vitamins and antioxidants.
Self-Improvement & Personal Growth
NaturVet VitaPet Senior pairs antioxidant and immune-support vitamins with glucosamine to address both aging-joint needs and oxidative stress, making it a leading choice for older cats that require combined joint and immune care. Its unique market position versus the other products is the dual-purpose formulation that can save owners money compared with buying separate joint and immune supplements, though it is less focused solely on immune modulation than specialized options like Nutramax probiotics or Vetri Lysine.
Joint mobility support
Age-targeted antioxidants
Senior-friendly chew
Senior-focused chewable vitamins combining joint-support ingredients (glucosamine) with vitamins and antioxidants.
Targets aging cats by supporting mobility alongside immune and general health maintenance.
Joint mobility support
Age-targeted antioxidants
Senior-friendly chew
Senior-focused chewable vitamins combining joint-support ingredients (glucosamine) with vitamins and antioxidants.
Targets aging cats by supporting mobility alongside immune and general health maintenance.
$15-25 CAD
Nutramax Proviable-DC Capsules
Nutramax Proviable-DC is a veterinarian-grade multi-strain probiotic designed to support gut microbiome balance and the gut-immune axis, offering a technical, clinically oriented approach within the Immune and Antioxidant Functional Support Treats for Cats landscape. Unlike treat-style chews, Proviable’s advantage is its scientifically selected probiotic strains and therapeutic potency—often at a higher price and used alongside antioxidant treats—making it the go-to for targeted gastrointestinal and downstream immune support rather than everyday palatable supplementation.
Restores gut flora
Multi-strain probiotic
Restores gut flora
Multi-strain probiotic
Review Summary
"Widely praised by pet owners and vets for restoring stool consistency and digestive health; most report clear improvement after use, with the main downsides being price and the need to open capsules for cats. Reliability and efficacy are commonly highlighted."
Sprinkle-and-serve
Multi-strain probiotic capsules designed to support healthy gut flora, which in turn supports immune function.
Sprinkle-and-serve
Multi-strain probiotic capsules designed to support healthy gut flora, which in turn supports immune function.
Self-Improvement & Personal Growth
Time-Saving Convenience
Nutramax Proviable-DC is a veterinarian-grade multi-strain probiotic designed to support gut microbiome balance and the gut-immune axis, offering a technical, clinically oriented approach within the Immune and Antioxidant Functional Support Treats for Cats landscape. Unlike treat-style chews, Proviable’s advantage is its scientifically selected probiotic strains and therapeutic potency—often at a higher price and used alongside antioxidant treats—making it the go-to for targeted gastrointestinal and downstream immune support rather than everyday palatable supplementation.
Restores gut flora
Multi-strain probiotic
Sprinkle-and-serve
Multi-strain probiotic capsules designed to support healthy gut flora, which in turn supports immune function.
Often recommended for short-term support during GI upset or long-term maintenance of intestinal health.
Restores gut flora
Multi-strain probiotic
Sprinkle-and-serve
Multi-strain probiotic capsules designed to support healthy gut flora, which in turn supports immune function.
Often recommended for short-term support during GI upset or long-term maintenance of intestinal health.
$30-50 CAD