Anyway, tonight, she's poofy and flank breathing, but also noisy. Chest noisy for the first time ever, rather than her usual nasal noise. By ear she's grunty, with a stethoscope she's also very squeaky. Stethoscope to the front of her chest gets more noise than on either side, if that means anything to anyone!
Her coat is really thin and staring and she's also lost 40g in a week and a half. There's nothing to her, while before although no muscle tone for a while, there was at least substance/ padding

What does squeaky mean as specifically different to grunty? A part of me wants to say fluid, but I'm not sure if I'm making that up or not?!
Her upper resp. issues have responded to baytril/ doxy/ co-amox and meloxicam and sudafed in the past. She hasn't responded to Zithromax. In terms of AB options, is a lower resp. infection in an older (27 months) rat likely to be the infection moving around the tract, or something else?