I have got a sick panther. I took him to a vet and she took a culture and found some sicknesses that she said would be cleared up by some antibiotics. I have finished the dose of antibiotics and he is still off. He is very slow moving, pretty weak and very lethargic. He is now starting to become a darker color, i dont know if it is winter coming around or if something else is wrong. does anyone have any advise?

