Can anyone, Kaye!, explain how these drugs work and which tissues it is effective in? Excenel is the drug the vet would like to give the doe who freshened with lumps in her udder. Ive been told this is the drug of choice for mastitis. While these lumps are technically "mastitis" they are not causing illness, changes in the milk or production in the affected side, etc. I asked if the excenel will penetrate these lumps he did not know what to say. Not trying to disregard his education or experience...but don't want to start spending money or adding useless antibiotics to this situation. So far I know of three other farms in Middle TN with similar stuff going on. I'm sure it has something to do with a very hard summer when most farms struggled to keep their stock fed and in good condition and then a wet, relatively warm winter. Onefarm is where my doe came from. The other two have shared stock. What I know is that there was also a negative staph plus other "things" that cultured sensitive to Baytril. Baytril has apparently cleared up lumps in some stock if it was used immediately. These were does who came down with lumps after freshening and secondary to the original cases... Also wondering what is the milk withdrawal on Baytril? I've had differing recommendations. From what y'all know are either or both of these drugs appropriate treatment?