She does it like 3 times aday feel it was something she ate and it tore up her butt?she is a mixed pup about 6 months old and it's in with muscus,other times no blood in poop later in the day,acts fine active,eats good

What does your vet say?

It may be worms but blood in the stool is never a healthy sign. I would suggest getting an appointment with your vet if you haven't already done so.