I have a pekin that has an inverted leg and I noticed she is struggling to walk she takes a few steps and falls.. not her normal. She does not have bumble and no heat in her legs. Im worried its kidney failure she is eating and drinking and pooping but there's this bright green color in her poop. I have niacin in one water dish and calcium in another and some apple cider vinegar in another one. Is there something I could do for her how do I know whats wrong. Maybe its arthritis bc its cold again...any thoughts thank you