help sick frog

As of today I noticed he had a bright green splotch on him that looked strange, should I be concerned? He eats food and turns brown when awake, he turned more brown and it's harder to see.. but I think some green is still present. He seemed active enough to run away from me and reposition...

I had bought two red eyed tree frogs back in April of 2018. I noticed this week that one of the tree frogs was having trouble with his back legs. He was in the water bowl at the time, so I nudged him out. He climbed onto the glass with his front two legs, but his back legs just hung down and his...