Since neutering the farrier who took too much hoof in one strike is out the question -- on to some possible aids
1. Even if the pony is not apparently foot-sore, you could buy some generic bags of frozen peas (they're cheap:) and duct tape them to his hooves for 20 minutes twice daily.
2. Can you or the BO get your hands on some used boots? Maybe either of your farrier's might have some or know someone who does?
If not, after measuring buy a new pair of therapy boots and also the pads to go with them, to keep the sole comfortable?
If the trim is fresh and the toes are cut right to the white line, I would call the boot company of your choice and have them help you with sizing:)
2.1. To reiterate, therapy boots almost always have pads with the boots and also have extra pads available for purchase.
I am sold on EasyCare's Clouds and their RX Therapy boots. The Clouds however, seem to fit wider hooves better.
3. Venice Turpentine is good. So is Durasol. So is Keretex which I have been using on my foundered horse since 2012, very frequently. He is still alive and so am I (some folks fuss about the formaldehyde but wear gloves if that is a serious worry for you:):)
It goes without saying, none of these mentioned products should come in contact with any fleshy part of the hoof -- not even the frogs:)
4. If he is at good weight, have the BO get him off anything with grain. If you are having success with what you feed your laminitic horse, give it try on the pony.
Grass hay - tested if at all possible.
Limited pasture time.
As much attention and smoochies on the snoot as you folks can give the little doll face. Which, BTW, where are the pictures:).