Calming supplement ยท Purina Pro Plan

Purina Pro Plan Calming Care Supplement

A probiotic calming supplement

Updated October 2026

Quick verdict

A vet-brand calming supplement.

Strength
One packet a day on food.
Trade-off
Takes weeks.
Right buyer
Cats with ongoing anxiety.
Dimensions (seller)
3.54 x 3.15 x 2.36 inches; 1.06 ounces
Product weight
1.06 ounces
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Why it matters

Calming Care is a probiotic supplement: each daily packet carries Purina's BL999 strain, which Purina says helps maintain calm behavior in cats. Sprinkle one packet on food.

A box has 30 packets, a month's supply.

Who it's for, and who should skip it

Good fit if

  • Ongoing anxiety
  • Cats that won't tolerate collars
  • Pairing with a diffuser

Look elsewhere if

  • Cats with untreated medical problems behind the behavior
  • Owners expecting instant results
  • Outdoor-only cats

Pros and cons

Pros

  • Easy to give
  • One month per box
  • Vet-brand

Cons

  • Takes weeks
  • Picky eaters may notice it
  • Ongoing cost

Limitations to weigh

  • Sudden spraying, hiding or aggression can be a medical problem; see your vet before relying on a calming product.
  • Ask your vet before combining supplements.
  • Give pheromone products a few weeks; most makers say results build over 1-4 weeks.

Specifications

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

FormPowderRetailer
Product weight1.06 ouncesRetailer
In the pack30 CountRetailer
Pieces1Retailer
In the boxNumber 1 veterinarian-recommended cat probiotic brand to support calm behavior (Kantar Veterinary Tracker, 2021), making it an excellent cat supplementRetailer
Model number00038100196033Retailer
Dimensions (seller)3.54 x 3.15 x 2.36 inches; 1.06 ouncesRetailer

Alternatives worth comparing

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Final verdict

A gentle daily option alongside a diffuser.

Where to buy

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

How do you give it?
One packet a day sprinkled on food.
How long does a box last?
30 days.