Your mother is going to NEED to go to some sort of rehab facility, or at the very least do physical therapy at home. A hard fall in a person that age can have serious consequences if she doesn't get back up to 100%.
Find someone to take care of her dog until she gets home. Maybe someone she knows in the obedience dog community???
Set her up a bedroom and temporary bathroom on the lower level of the house. Or possibly consider renting a smaller house for her, that's more suitable. She could also look into having a bathroom added on the lower floor. But steep stairs are a very bad situation for someone her age.
She should be able to get some sort of home health care, or housekeeping service, until she is able to take care of herself 100%.
Her emotional state is pretty important. I strongly recommend getting her back in her home and her dog back with her, by any means possible. If she gets depressed and gives up, it's all over with.
The hospital SHOULD have some sort of social worker/discharge coordinator who may be able to help you set up her care when she leaves the hospital. But you are going to have to go up there and deal with the dog and house situation, at the very least.
My sympathy to you.... dealing with elderly parents can be tough in every way.
