amoxicillin

My rats have a URI and so I'm going to give them amoxicillin. Moody is 66g and Ollie is 83g. I know the dosage is 20-30mg/kg and the concentration of the amoxicillin is 250mg. Ive tried putting this info into a calculator but im getting weird numbers. If anyone could help me figure out how much...

My rat has become sick: he's lethargic, sneezes, and has labored breathing as of yesterday. I've started giving him amoxicillin (250 mg per 7.5 cc, giving him .3 cc every 12 hours), but I read that it doesnt treat mycoplasma. How long should I wait for symptoms to get better before putting him...