Bloody stool (I think)

Hey guys,
Does pumpkin make a dog's stool a different color? My puppy was okay .. just had minor diarrhea after switching his food 4 days ago. I gave him some pumpkin last night and this morning it looked like his stool had blood in it? Should I change the food slower? I did it pretty quicky and also could the pumpkin be causing the stool to be red?

Blood in the stoll usually means worms. Diarrhea and blood is usually whipworm. You might want to get a wormer that takes care of whip. (Safeguard is a good wormer).

Anyone heard of Endosorb? My breeder thinks it may be the stress because he was separated from his mother and littermates.