I have a 16hh Welsh cob and he is currently turned out in a 200g Rambo Wug (half-neck), and I've had it for probably right years now. Given his chunky shoulders I was a bit dubious on how it would fit, but it fits him lovely round the neck - it has the V-closure of two angled trigger clips...
Dried spearmint can work, and it's good for the digestion. I wonder if it will be even better steeped in a bit of hot water, cooled, and then poured over the feed. I only ever used it just dumped dry into my horse's straw chaff but I reckon made into a kind of tea might bring out the flavour a...
Instead of lifting the back leg in the usual way (ie pulling it towards the rear of the horse as you would to pick out the foot) try lifting it forwards so the leg is being brought underneath her belly. Only lift it a small way off the ground and put it down after a second or two followed by...
Has a right good go on someone else's salt lick given the opportunity but refuses to acknowledge it if I buy him one. The same make and model. Every time.
Oh poor little love, but as others have said - food in trap, trap somewhere dark and quiet (up against a wall, in a corner etc). If it's still behind the muck heap then I would put the food and trap there up against the wall if there is one.
Keep us posted.
At some point a line has to be drawn in the sand though, and now seems to be an appropriate point in time. Let the hunts prove or disprove themselves and then go from there.