Hi Everyone.... I'm having more problems with my 1.5 year old boxer Hudson. He has lost probably 5-6 lbs. over the last few months and lately his stools haven't been so great. I haven't been too concerned about that since we are switching his food to "California Natural" from EVO b/c of his sensitive stomach (he didn't do too well on it). But today, he had an accident in the house. And I'm actually glad he did, b/c if he didn't I would have never seen what was in it. (Warning! Graphic details ahead....) In his stool there was a LOT of what looked like strawberry jelly...jiggly clumpy red stuff... there was also this white stringy mucusy stuff about the width of a q-tip. i had noticed a smaller version of this stuff on monday and had a stool sample checked at the vet, and everything came back negative (bacteria, parasites and worms). However today's was a lot worse. He doesn't really get treats, so all he eats is his food. Any idea what could be causing this?