I need some advice. My one kitty, Oreo, has been sick the last few days. We had him locked up in our room on Sunday and Monday to monitor his eating, drinking, and output. He also went to the vet on Monday to get some medicine. On Tuesday, I let him out because he was eating, drinking and acting a bit better- still sick but better. Now, our other 2 cats are having a fit. They are hissing and growling at him. They used to all get along just fine and play and sleep together. Is it because he smells differently and this will pass once he gets better? He is also wheezing a bit which could sound like he is hissing at them?????? Any ideas??