
We have bearded collies and they round up everyone including the cats ,balls etc they are not as full on as a border collie.
imagine it... mine bark too as that is thier natural instinct they are known as barking beardies!!
I would imagine working him ie start with a training class /agility to use up all that excess energy .
I dont think crating him will do anything other than possibly stress him out.
(Although I am in favour of crates.)
To me it sounds like he is enjoying it ...thats his fun ...borders being intelligent dogs need to use thier brain he's worked this one out for himself...
I used to go training 4 times a week to keep my collies occupied they came back mentally exhausted and happy.
Roni