Pro Plan Calming Care is a daily probiotic supplement formulated for cats that display anxiety-related behaviours — hiding, excessive vocalising, or struggling to settle during routine changes or environmental stress. It comes in 1g single-serve sachets, available in a 30-pack, designed to sprinkle over or mix into the cat's regular food.

The active strain is Bifidobacterium longum BL999, selected for its role in reducing stress-signalling behaviours rather than purely supporting gut function. It's intended as an everyday supplement — not a one-off intervention — with effectiveness building over consistent daily use. The powder format integrates easily into wet or dry food, and most cats accept it without needing to mask the taste.

Owners typically turn to Calming Care when environmental changes — a move, a new pet, or disrupted routines — are triggering visible stress responses. It's also used as a baseline supplement for cats that are chronically anxious rather than situationally reactive.