Used a bull one year for cleanup - produce awesome calves - didn't know it till after I sold him. Fella wants to trade him back to me for a new bull so he can retain some heifers. Wouldn't mind collecting him - maybe using him for cleanup again. What sort of quarantine do you use to minimize cross herd contamination? The other fella runs a closed herd, but wouldn't necessarily say it has a top notch herd health protocol. Thoughts?