i was always told its always better to fly a hawk on hares after 2 seasons or more, so smart call. many inexperienced hawks try there luck take a beating then refuse them all together, better to leave them to perfect there technique on rabbits before moving them on. dont get me wrong i dont regret at all picking my male over his sister but when that hare does get up in front of me i do kick myself for not having the right bird for the job, but its the same with pheasants and partridge
let him have a go pal, if he got the head hold perfected on rabbit he can do same with hare just make sure