This morning I woke up, and when i went downstairs to let my dog out of his crate he had really bad diarreah with some blood in it. As i was cleaning out his crate he threw up alot of brown fluid. I waited a little while and then i fed him a small ammount of kibble, but he threw it up after about an hour. Now his diarreah has gotten much worse, everytime he goes there is an increasing ammount of blood in it, and his stool has become a dark brown/black color and it has an odd smell. I would really like to take him to a vet but my parents wont be home untill tommorow evening and I have no way of getting to a vet.
I'm worried about him because he is not as energetic or happy as he usually is, and he wont touch any food. I have provided him with plenty of water but he is not drinking it so i'm scared he will become dehydrated.
Also, I once took him to the vet one time for having some blood in his diarreah, so the vet recommended to put him on a sensitive stomach diet, which i did, but this time it seems worse.
Any advice? Could this be serious?