Fleetfish, that pony was 40 something years old? Amazing! My cousin had an old quarter horse that lived to be 35 or so.
Laki, do rats play fight a lot or does Delilah have it in for Dinah? She jumps her a lot and grabs on to her legs and tail. I can't tell if it's true aggression or not. Dinah usually squeaks.
Kinetic, if it makes you feel any better, my rat Delilah bit and drew blood the first day too. Now that she is used to me, she hasn't done more than mouth me so hopefully MoMo will be the same.