Alright folks, my first day watching a friends house while he is on vacation for the first time in 9 years and I have problems the moment I open the gate. First one of the 5 dogs is missing, and I can't get ahold of the owner to see if they took him with. Asked my son if he was there when we got there and he said "no, only 3 white dogs"(supposed to be 4 white, one black) Then I go to feed the chickens/geese/ducks and I got through that fine, filled the water container and as I am walking out I see a chicken laying on it's side half under the coop.

I went over and picked her up and nothing but bones and blinking eyes, she was breathing but I not moving. I could feel her breast bone and nothing else, I swear there was more meat on the chicken carcass last night than there was on this little girl. I tried to give her some water, and she wouldn't drink, so I moved her to a shaded spot in the run and the rest of the chickens swarmed her, so then I moved her into the fenced garden area outside the yard, figure she wont run off because she isn't moving.
But I can't get ahold of the owner to see what he wants me to do, and I don't feel comfortable killing her if that isn't what he wants me to do. I am in tears because I feel like I just did the biggest mess up in history. Last time they went on vacation their 2 dogs were gone, like 3 miles from home, and one never leaves the yard, and the other was at the shelter after being stolen(he is a purebred). Now I have a missing dog, and a dead chicken(pretty sure when I go back up in a hour or so she will be dead)

I searched the whole yard, tapped on the back door to see if maybe he snuck inside before they noticed, looked under all the plants, checked in the garden...no dog. The only things that didn't have a problem are cats, fine and fed, and the plants are all watered.