Coyotes

We have been seeing Coyotes at night around our house. The girls are afraid they are going to eat Zorro aka Taco their beloved Chihuahua. He is a standard size not a tiny tea cup about 15-17 lbs I would guess. I am more afraid of them getting the blind dog our 11 yr Schnauzer if he wonders out at night. We do have a fence but they are still worried. Our little mixed terrier puppy the vet tricked me into taking has turned out to be a Irish Wolf hound mix and 65lbs at 8 months. I really don't think anything would come around if he was outside. Anyway the girls have abandoned their room and now sleeping with mom while dad is on the road so the Coyotes don't get them!