Ive done the basic dog handlers course (not the RAVC version), its fun to for a while but it gets a bit boring as the months drag on. Bonuses include everyone from the CO downwards giving you a wide berth when they see you walking a crocodile with fur around. You do need to be strong enough to handle large dogs but thats only at the start after that they should obey your commands, unless they see a rabbit running around Lipa in which case prepare to spend half the night chasing the fleabags around.
every part of trainign in the army is tough but if you really want it then stick to it and it will come eventually. once you get the job after finishing all training you wil absolutely love it. my dad took this exact career and im currently in the procces of dong the same.