Doxy is an antibiotic, that is given orally. (I believe it can also be injected? But we always administer it orally.) When we have bad respiratory infections, we usually do a Doxy/Baytril combo.
Here's more information! http://ratguide.com/meds/antimicrobial_ ... ycline.php
Here's more information! http://ratguide.com/meds/antimicrobial_ ... ycline.php