Walker Needed For 3 Dogs, 1 Cat In Concord

We have 3 dogs. 1 Pincer Chihuahua, male 12yrs, 1 Chihuahua, female 12yrs, 1 Terrier mix, 12yrs? We take all 3 of them for an approx 30 min walk each day. They are fed 2X's per day and meds given for the 2 Chihuahua's at each meal. They are usually up at 7 a.m. for first meds and breakfast after. Dinner is about 5:30 p.m. and then they are Pottied about 10 p.m. and locked in with us for the night. 1 short hair cat 14yrs. H loves attention but cannot be inside as one of the dogs chases him. He is locked in garage in his bed at night by 9 p.m. and let out at 9 a.m. each day. He has dry food all day until canned food at 5:30 p.m. no meds.