Bloody stool and red stomach.

Question
I have a four year old Shih Tzu. He is always very playful and always has a lot of energy. However, he has stopped eating lately, and his usually pale pink stomach is now red, especially under his armpits, for lack of a better word. When he goes to the bathroom, it is a form of diarrhea, and the majority of it is blood. He is very agitated, and he can't seem to get comfortable. What could it be, and what can I do about it?

Answer
Thanks for you question.  I have owned a few shih tzus in my time and the most recent had simular problems.  It was failed liver.  Not to worry you but i would immediatly take you dog to the vet.  Another possiblity could be worms.  That would cause the bloody poo. Look for worms in the poo and that should determine that.  I have also heard that if you find worms in the poo to feed your dog chew.  I dont know how true this is but i wouldnt try it until you take him to the vet.  Sorry i couldnt help more but get him/her to the vet right away.