Lorraine your sister should speak with the hospital social worker. The Vancouver Island Health Authority does have respite care facilities available in your area. She will need to be firm and tell them she needs a break at this time, and just can't take him home until she has a break. In our over stressed medical system, they will pressure her but she needs to be very firm and insist that she cannot do it without a break. She might be best to have you with her when she speaks with the social worker--to provide moral support. I am sorry she is having such a tough time. Also, it sounds like he needs re-assessment by the ALS Clinic for his eating issues which may have caused the pneumonia ie. some aspiration due to inability to swallow.
Laurel