Can I Give My Dog Crananidin?

Yes, with care
Cranberry extract is commonly referenced for dogs at published doses. Published guidance for dogs: per pet-product label, every 24h. Evidence modest. Straining to urinate needs a URINALYSIS first, supplements do not treat infections.
Source: Veterinary Partner (VIN)
Get the exact range for your dog'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 dog's health history and other medications. VetDose shows published reference data, not prescriptions.