I woke up this morning to find a big red splotch on the bottom of my silkie rooster's cage. It didn't look like bloody poop (poop mixed with blood). I was just a splotch pure, red blood, although it looked thick in consistency. The second I let him out of his cage, he immediately pooped but it was normal (green bits with sticky clear liquid). I feed him bread every day and try to change his water bowl when I can. He's the only one at home so I don't think he could have gotten any diseases from other chickens. Besides, this seems to be the only time, but I'm still worried. What could be the problem?