I did see the post where you said you mixed it your feed. This is good to know. Do you add it to your feed all year long, just during certain seasons or just when the need arises?Tylan is a broad spectrum antibiotic. I use it on the sheep if one gets pneumonia. It treats a lot of things. Some people put it in their birds waterers for respiratory issues and I have Tylan 10 added to my chicken feed as a sort of preventative.