My cat is an older male whom I have had for about 8mos. He belonged to my brother who is now deceased.For a few days now I have noticed him going to a corner & just sitting looking strange,at first I thought he saw a mouse or something.Then I noticed the carpet was wet I thought,it was stained from blood.He also jumps into the bath tub & in the same squating position he stays for a short while.This is when I knew it was blood & that he wasn't just going in the house.(which he has never done)I can't tell if he is bleeding from urine or bowl.Although it looks like he cleans his rear area each time.He uses a litter box & goes out side as well.I am now trying to watch his litter box to tell how much he uses it.He is also an over weight cat who constantly wants to eat,he eats so fast that he throws up some times.So I thought by mixing dry food w/can it would slow him down.I also only give him small amounts at a time,but he eats 3 or 4 times a day.Any information you can give will be greatl