The feedlot is a type of animal feeding program used in intensive animal farming that will have an entrance protocol in which new animals entering the lot are given vaccines to protect them against potential sickness, whereas these entrance protocols are usually discussed with the farm's veterinarian.
A feedlot or feed yard is a type of animal feeding operation (AFO) which is used in intensive animal farming, notably beef cattle, but also swine, horses, sheep, turkeys, chickens or ducks, prior to slaughter. Many feedlots will have an entrance protocol in which new animals entering the lot are given vaccines to protect them against potential sickness that may arise in the first few weeks in the feedlot. These entrance protocols are usually discussed and created with the farm's veterinarian, as there are numerous factors that can impact the health of feedlot cattle. 
