It's not really the cat poop that's bad for them (assuming your cat is indoor only and healthy, if not all bets are off) its the litter. Most people don't use biodegradable litter, and even more use the clumping stuff. Well if it clumps when it gets wet think what it does in the dogs intestine. Basically you could get a blockage in the intestine. Not only that but I agree it's really disgusting. I've now had 2 dogs that do it. My terrier mix did it when he was younger, then we put the cat litter up where he couldn't reach it. It stayed that was for years (3 years), until we moved and w/o thinking put it back on the floor. He never touched it in the 6 years it was back on the floor till he went to RB. My lab/shep/chow mix (2yrs) does it as well, I don't really have a place for it to go up now, so I've turned it towards the wall of the shower it's in, making really difficult for a dog his size (70 lbs) to get to, but the 12 lb cat has no problem.