Pet Care Needed

We are leaving for a week. Mornings the dogs need to go out to do their business. We have a fenced in yard, and fed. Noon time to be let out, and in the evening let out and fed. The sheltie is old and joints are stiff. hard of hearing, loves everyone, and currently taking a pill twice a day for pneumonia. The Chihuahua mix is almost blind, likes to bark, and takes a few minutes to adjust to a new person.