Booboo's Vet Visit

8/27/15: I found blood next to my cat's litter box this morning. After checking his rectal area, I noticed dried blood. I suspect it's the food I've been feeding him, so I'm making a change but he needs to see a vet in case it's something that requires medicine/attention. I'm currently in between jobs and don't have the extra cash to take him to a vet. :( My cat is my rock and we've been through so much together. I would lose it if something happened to him. Please help me make sure he's okay!