so one of my guys has been scratching alot on his back, ive frozen everything for 72 hours before ive put it in his cage, and i only bath him with water and a super soft toothbrush, but now the skin on his back looks pink and irritated the hair is also falling out rather quickly, my guy is 4 months old..but im getting really worried..his energy seems down and i dont no what it could be, if he has mites or something would they be visible because ive looked all over his body very carefully and i dont see anything other than redness..hes still very kissy and lovely but hes itchy..any ideas??