Wow! Didn't know this. I knew about withdrawal periods, even lengthy ones, but forever?? Are there specific antibiotics that fit this category? I'd like to know what they are.Tylan wouldn't be my first choice at all. Check with your veterinarian, and realize that any effective antibiotic wii make he eggs 'officially' off the table forever...
Mary
Hens go broody when you don’t want them to… and won’t go broody when you do. 
