I have a 10 year old Male rotty and in the past two days I noticed his hind legs were giving out on him. Then I noticed that my other rotty was eating his food because he was not eating any of it. He has been drinking water and keeping hydrated, but has been eating nothing. This morning he was extremely weak,and I noticed this yellow goo on his lower eye lid. Its not watery and oozing out, its just on there. I just offered him some chicken broth and he has no interest in it. I know he has some arthritis but why the sudden fast down fall. Bone cancer? An infection somewhere? Is he dying? Any help on this would be nice.