Hunts damn well, but don't give him a problem he can't solve with his teeth.
(Also can't watch out for that tree, rip).
His hen's name is Gertrude! He picked her up after wandering near a human settlement. Normally the hunting parties steer clear of humans, but it was love at first sight once Chaucer found this lovely lady. They're inseparable!
After a particularly harrowing hunt, and almost dying if not for his huntmates, his outlook on life has brightened considerably!
{Or, why his personality changed from Bossy to Optimistic.}