so I got my Eddie about a week and a half ago, and he appeared to have a respitory infection pretty badly.. sneezing up boogers all day and wheezing. His skin was very clear when I first got him. I had him seen by the vet and they decided to give him doxycycline for his infection. He has been on it for 3 days now and his skin has gotten progressively worse. It is not turning dark and spotty ( I did switch his litter from "so fresh" to an arm and hammer brand Please any help, tips, anything to help keep my boy healthy and happy Thank you!!