Sami has had a tummy ache for a couple of days. Friday night she was up and down eating grass- but no vomiting or diarrhea. She seemed fine Saturday morning- ate and drank well. Her poop was a little soft but formed (sorry to be gross). Last night she was up and down again- but eating and drinking well today. Just now I noticed she seemed to be having a hard time going to the bathroom- straining a bit to poop- it's still soft but with a bit of mucus, grass... and I can't decide if a bit of blood. She is behaving her usual self- I can take her as a walk in to the vet at 8 tomorrow- Has anyone dealt with something like this before or do you think I should take her to the ER vet tonight?