Question: how much penicillin to give a dog for uti?
Answer: Abstract. Penicillin G or ampicillin was administered orally to 144 dogs with urinary tract infections. The daily dosage of penicillin G ranged from 110,000 to 165,000 U/kg (50,000-75,000 U/lb), and the dosage of ampicillin varied from 77 to 110 mg/kg (35-50 mg/lb).