Why is there yellow pus from my dog’s penis?

Yellow pus from a dog’s penis may be a bacterial or fungal infection from an injury. Clean it with saline, rinse with metronidazole solution to reduce inflammation, and apply an anti-inflammatory ointment containing neomycin or erythromycin to the area.

Then give the dog pet cephalosporins or norfloxacin orally. Put an Elizabethan collar on the dog to stop it licking the medicine off the genitals and getting poisoned. Also keep the home clean and wash and disinfect the dog bed regularly to reduce bacterial infection.