Mine all four (boys) waddle happily into a tractor with the chickens and the turkeys when it gets quite dark. They insist on being in the *same* tractor with one another.

There’s no separating Paul, John, George & Ringo. They follow one another around in single file everywhere they go. (Which is how they got their names, though I can’t tell them apart. I cannot watch them without thinking of the White Album.) So funny, those boys.
From what I’ve read in Holderread, this nightly drama is par with ducks. They will eventually get used to a routine and will stick to it. Inconveniently, this routine may consist in you chasing them around the place for a half an hour in an intricate, circuitous route which is not allowed to vary at all from night to night. You just have to enjoy the journey.