
Hmmmmm,
I wouldnt have t hought the rabbits would be a problem, so long as they are in a secure enclosure......
As far as deaf dogs go, i havent any experience with them, but i do have a 1 yr old lurcherlet, who is a complete GIT......that said, his recall is not one of his problems, and since your parents will have the pup from such a young age, i would have thought that training to hand signals would be easy enough. I could forsee problems if it was an older dog though.
Good luck and i hope they get the pup!
Em