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PROBIOTIC FOR CATS

Purina Pro Plan Veterinary Supplements FortiFlora Feline

Powder sachets, positioned for loose stools, antibiotics, everyday gut support.

Purina Pro Plan Veterinary Supplements FortiFlora Feline
FORMAT

Powder sachets

FOR

Cats

TYPE

Probiotic

COST

$1.03 a day

EVIDENCE

Trial of this product in the animal

CUSTOMER RATING

4.7 out of 5 from 20,330 ratings at Amazon

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What is in it

  • Enterococcus faecium SF68 (the current label prints it as Enterococcus lactis SF68) — 1 × 10^8 CFU per 1 g sachet, with taurine 5 mg (label panel on proplanvetdirect.com/feline-fortiflora-probiotic, read 16 Sep 2026)

What owners consistently report

  • Picky cats took it in food or warm water
  • Used through a course of antibiotics without trouble
  • Owners reported firmer stools and less vomiting

What the research supports

In a double-blinded placebo crossover of 217 shelter cats over two 4-week periods, 7.4% of cats on SF68 had diarrhea lasting 2 or more days against 20.7% on placebo (P=.0297) (PMID 21689152). In 27 laboratory cats given amoxicillin-clavulanate for 7 days, FortiFlora for 14 days (n=13) versus placebo (n=14) gave lower total diarrhea scores over days 1 to 11 (P=0.0058), with fecal scores above 5 in 9 of 13 against 12 of 14 (PMID 29291771); the same design showed the dysbiosis index normalized by day 14 (P=0.0322) (PMID 41923274).

What the label discloses

The label names Enterococcus faecium SF68 in 1 g packets, 30 per box. The label panel on the brand’s own store states 1 × 10^8 CFU of Enterococcus faecium SF68 (printed as Enterococcus lactis SF68) per 1 g packet, with taurine 5 mg. Guarantee timing (through expiry or at manufacture) is not stated on the pages read. The Amazon page lists animal digest among the ingredients, which one reviewer objected to.

Dose by weight, from the label

ANIMAL AND WEIGHTLABEL SERVINGCOST A DAY
Cat, under 10 lb1 sachet a day$1.03
Cat, 10 lb and over1 sachet a day$1.03

Cost is the pack price at the retailer named below divided by the servings in the pack, at the label serving for that weight. Your vet’s instructions come first.

Worth knowing

No label warnings beyond the standard veterinary-supplement wording. Among the Amazon reviews read there was no pattern of complaints; owners of picky cats reported acceptance.

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Not sure this is the one for your cat?

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Related reading

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