Does anyone have any suggestions for a domestic rat, 2 years old (elderly), who has had a large but soft-appearing fatty tumor growing under his front legs. It now is so large that his whole torso is taken up by the growth. His white fur has turned yellow, suggesting liver involvement, & his eyelids are somewhat swollen. He has become very aggressive--I spoon feed him and he rushes at the spoon savagely, biting on it, but his appetite is good. No observable thirst. I tried Conium Maculatum, and Rescue Remedy, but don't know what else to do, other than euthanize him because he can't easily move around anymore. Any suggestions would be appreciated. (And "he" is actually a "she".)