Can I Give My Cat Crananidin?

Yes, with care
Cranberry extract is commonly referenced for cats at published doses. Published guidance for cats: per pet-product label, every 24h. Male cat straining = possible blockage = ER, not supplements.
Source: Veterinary Partner (VIN)
Get the exact range for your cat's weight

Skip it or ask a vet first if

urinary straining without diagnosishistory of oxalate stones

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.