I have a single chicken that we believe has bumble foot. We have had her on oxytetracycline HCl for about 12 days. The directions suggest that we quit administering in her water after 14 days. while she has improved, she is not all the way better. Is there a downside to keeping her on this longer? If we cannot keep her on beyond 14 days, how long before we can put her on it again? Note: the chicken is a layer and we have been throwing out the eggs. We will not slaughter any chickens at all ever if we can help it. We get our chicken in plastic at the grocery store. I am unable to perform surgery or inject the feet. This seemed to be the best way to handle this issue. She has improved quite a bit.