Donkeys and Cats

The donkeys and cats around here are not a good mix. The donkeys want to stomp the cats and the cats refuse to stay out of the pasture. I do not understand why the cats can not understand they are in danger every time they go across that fence. The other day Ned watched Athena running around and it looked like he was going to tolerate her in the pasture but then changed his mind and started chasing her around. Good thing the cats are quick.