Animals stand still

When I was in my secret base, I was trying to take my horse out for a ride, but he wasn't moving. Early today I noticed that my barn animals weren't moving, so I had to kill them, but when I punched, they didn't turn red or move, and after they died, their drops were not were I killed them, but a few blocks away from where I killed them. I have no idea what was going, please look at it and fix it.