Izzy Armstrong

Don't let your legs slip back, it is something most people don't realise they do but it is a bad habit

Road work, hacking out on the road, it also builds muscle

I don't now what country you live in so the currency might be different but I'd say £2500 to £4000

Exmoor pony

Add speedi Beet to their feed, or if they don't get breakfast, try giving them one

Pumice stone grooming block

Try and ride through it, if you don't think that is not just behavioural, try things such as a different bit, refiting the saddle, if nothing improves try to see if it is medical and ask you bet for advice on going forward

His saddle might not fit properly

Hoof grease tends to work better than hoof oil