this is a living creature, i understand the stay at home mom thing and all that but there is no way i would allow a poor dog to just sit in my back yard dying/or sick (if thats what is happening). Also too putting your other dogs at risk. Parker just had diarreah the other day and I flipped.and took him to the vet..I would suggest you calling a shelter where they will take him in and give him the proper care he needs...
I am not trying to come off mean or harsh I just couldn't imagine a poor baby being sick or in pain. Clearly he isn't healthy at all.