Hi Kevin U-
Sorry, to hear about your pup’s yucky poop. How old is your puppy? How long have you had him? It is fairly common for a pup to have some digestive issues right after you get them and have done a food change. However, parasites and worms are also common for new pups. If you have not taken a stool sample into the vet to be tested, I definitely would. My puppies had both giardia and coccidia when they were young. Switching foods did not help them at all. I had to deworm them and give them a prescription med a couple of times before they got better. Then I gave them some probiotics for a while to get their tummies back in order.
Here is a link that was helpful to me at that time:
http://www.dogaware.com/health/digestive.html
