OK, I'll bite on this one.
DH is Guy, it's been his nick-name since he was a kid, & it probably always will be. He's even uncle Guy to the nieces & nephews.
I get Mills alot. Millsie by my best friend (Joyfully - her name is (was) Joy Lee)
DD -silly goose, punkin', Cady-girl, Cady-did
The Jack Russell has mutated from Tinker Bell - she came with that name, to Stinky Bug or Bugger Butt, stinky butt, obnoxious little ... sorry, won't go there! The mutt Gus is ... well, he's just Gus
The horse & goats are usually "the ladies" or the "big girls" or "mama's"
Millie