My dog went out and ate a bunch of grass then immediately came in the house and pooped the undirected grass. It was encased in a clear jelly like substance with fresh blood mixed in. Earlier in the day her poop was normal. Should I be worried?
Mucous and blood in the stool can happen for a number of reasons, if it's routine for her to eat an assortment of things from outside then it's possible she got into something that irritated her bowels.
Bland diet (hamburger + rice) for the next 24 hours, if no improvement it warrants a vet visit to rule out some causes (parasites, bacterial overgrowth, Inflammatory bowel disease etc.) and to be placed on the correct medications.