What was your puppies creatinine count? Is it possible that he was just dehydrated, this can increase the BUN. What exactly did the vet say the abnormality in the ultrasound was? Sure do hope the vet was wrong, how about getting a second opinion. I'll pray for your little guy...
__________________ As Ever, Kathy 
Intruducing Bentley  Winston and Spencer: RIP My Sweet Angels |