I have a 10year old nanny Pygora who has been acting strangely for about 2 months. She appetite is decreased,she lays down a lot, and sometimes sits with her front legs up in front of her with her chest off the ground. Her hind leg hair is coppery. I read an article on copper toxicity in pygmys. I did dose her back in January with Copper in between a marshmallow. I have done this before with all my goats, and never had a problem. Her poop is fine, she moves slow. I have cut her hooves-no infection although her rear left leg is definitely skinnier than the right and she keeps it raised and kinda crossed over the right leg. Her dew claw on that left leg is long and crusty and feels hollow. Any ideas?