I often think that the perfect fam would be laid out in one farm parcel. But of course ours isn't. We have a few acres around the farm dwellings and another ten acres across the main road next to the bay. It's often too busy and dangerous to move cattle along the road. We take them to their summer grazing in the cattle box trailer.
Every twelve months the cattle have to have their annual test for TB. If they are over 2 years, they get blood tested for Brucellosis. You also need to blood them if you want to sell them. I don't think sheep or pigs get tested for TB. Except when they go the slaughter house and vets take samples. We have to pay the vet to test the cattle every year.
One of the credentials (requirements) of getting an herd number is that you have a cattle crush for testing for TB. We have two cattle crushes. A bought one up at the farm and a home made one down in the fields. It's great for putting the cattle in for dosing for stomach worms, replacing lost ear tags or treating a sick animal. You can also test the cattle in it for TB. We made the field crush out of old scaffolding tubes and corrugated iron sheets and concreted them in. A welder we know made up the two gates and used his mobile welder to fit them. The crush cost next to nothing and made life so much easier for us.
Pictures of a field cattle crush. The rust is beginning to paint a lovely patina on the steel. I love corrugated iron.