Oh boy I'm getting concerned

Yesterday I only fed the dog some rice and cottage cheese. He seemed fine and hadn't thrown up since about 9 a.m. He played good last night and acted completely normal.

This morning at 5a.m. I was sleeping comfortable after a hellish night of being too hot and intense knee pain... when all of a sudden I felt a warm gush on my lower back. Poor doggie threw up something fierce. We had to get up, I had to jump in the shower to wash it off my back and then we had to change the bed... but now I'm worried....

Not only did the vomit contain cottage cheese and rice undigested, it also contained something reddish color. Couldn't tell if it was blood. Don't know. He's back to sleep now and seems to feel ok but I think we need to call the vet today and see what's going on. This is long enough.

I also have the strange suspicion someone might have given him some food other than the rice and cottage cheese. In fact that other person many times gives him things I don't want him to have. If in fact I find that to be the case I am going to be angry... yes I am.

J