Pet Care Needed - Full-time / Part-time

I have a fenced in yard in which they have full control of. I have 2 dogs, the 1st one is approximately 89 lbs he has hip dysplasia but its controlled with medication at feefing time. The 2nd dog is a yorkie. She's a typical yorkie, playful and attentive. She has a heart defect which is taking medication forand also a breathing problem that.