NO I DON"T HAVE A PICTURE!!! LOL

Every so often I find a really bloody offinsive smelling stool. I think I have figured out it is Max not Meka. So can this be from the hairballs - he is throwing them up. Can it be worms??? Meka was wormed when I got her from animal control but Max was not. The vet said he was healthly but I have my doughts now about that particular vet and am thinking about taking him to another for a checkup but dont' want to stress him out doing that unless necessary. He has also started meowing at the back door and wanting out bad! I don't dare let him out in my neighborhood. I have a fenced back yard but they are wooden and you know that is no chore for a cat. HE has darted out and if we don't chase him just act relaxed he doesn't go far around the back yard exploring and we are able to just walk up to him and pick him up and bring him inside... Any ideas? Meka terrorises him and backs him in places and stalks him - he is 1/2 again her size with long arms - I don't know what she is thinking - he could hurt her but he always let her hurt him without fighting back.... Why???? Thank you - I'm afraid I'm not worrying enough or am worrying tooo much.... Debbie