Pet Sitter - Full-time / Part-time

We have two Yorkies. One is 23 years old, is almost blind and sometimes needs help on stairs. The other is 5 years old and she likes to be outside. We feed them at 9 am, 12:30 p.m. and 6 p.m. We would like someone who can stay at least one hour at each meal and to stay overnight. We have a fenced in back yard and a deck to lounge on. They can play outside while you relax.