Can I Give My Cat Metamucil?

Yes, with care
Psyllium husk is commonly referenced for cats at published doses. Published guidance for cats: 1/4 - 1/2 tsp in wet food, every 12-24h. Ensure water intake; fiber without water worsens constipation.
Source: Veterinary Partner (VIN)
Get the exact range for your cat's weight

Skip it or ask a vet first if

xylitol-sweetened productsintestinal obstruction

The safe habit

Confirm any medication decision with your veterinarian, who knows your cat's health history and other medications. VetDose shows published reference data, not prescriptions.