We have a sweet 14 week puppy, who has been suffering from small amounts of blood in her stool for awhile now. Sometimes it's diarrhea and sometimes it's normal stool. We switched her off of pedigree puppy (which is what the breeder was feeding) at 12.5 weeks to Nutrisource chicken, we thought it was the Pedigree causing it. The new grain free food seems to maybe be helping but we still see blood at least every other day. Penny loves to play, has tons of energy, and still was eating, and sleeping like normal. No other symptoms! She went to the vet and they suspect colitis. I was hoping to hear if anyone else had this with their puppies!!