Arnold seemed reticent to eat today. Apparently had diarrhea from some wheatgrass i gave to him and his mate. I trimmed and cleaned his rear end. Vet couldnt see him today, just said to give him critical care and roughage. Now his back legs are limp and no vets are open. He sprawls on his belly with his back legs behind him, and wont walk when out of the cage. Help!! His is a couple years old and has never had health problems. He is swallowing critical care and will eat hand fed carrot top stems. Am really worried.