Rayna, i have seen organ grinder monkeys that have been trained to assist
PWD, I'm not sure how to find them, though perhaps PBS TV has some info.
also, what about a  pygmy horse, about the size of a collie dog, but they're
actually miniature horses trained to help. the monkey could go get a phone,
or activate an alarm for you, and stroke your face while help was on the way.
;->