While there are occasions that warrant immediate vet care, I do not think alarming someone for a low incidence as a side effect of a medication, which the vet can explain, is the correct thing to do. The pet owner, the pet and the vet should make a decisions based on what the actual findings are, and what is best for the dog.
Medications do list ALL side effects, they have to by law. That does not mean that an instance of scooting will lead to “Get ready, loose stools are next, then diarrhea, then bloody diarrhea”, which you stated.
I am sorry if your dog experienced this first hand. It can happen, but the incidence is low.
