Poultice on a weanling's leg

Apply poultice, cover with a layer of cotton wool that you buy in the roll from the chemist , cover with several layers of vet wrap leaving a good couple of inches of cotton wool protruding up the leg, but don't over tighten it, tape it off lightly with a layer of silage tape, cut a meal/fertilizer bag in half, hold it up and then cut it sorta of diagonally leaving a sleeve that fits the hoof at the small end but enough plastic to cover the cotton wool/vet wrap. Silage tape firmly in place mostly over the hoof and a few wraps up the leg. Most importantly remove and replace every day with new poultice and cotton wool, you can use the same meal/fertilizer bag again.

Edit to add - anyone that is used to bandaging horses will know how to do it. If you have someone locally that keeps hunting/racing/competition horses they will be able to show you.

IMO cotton wool is the most important because it elevates pressure on the blood vessels going too and from the hoof. You can get a roll of it in your local pharmacy - something like this https://www.inishpharmacy.com/p/irish-breeze-hospital-quality-pure-cotton-wool/p-ib2501051/ibcotton1075?gclid=CjwKCAiAy_CcBhBeEiwAcoMRHDoCSCYDakxcdaXpT4RELwRUbfntk1GH0_0Q3n3ityhLAJ8GPqXjqxoCvdYQAvD_BwE

It's not that hard to do. But my only experience comes from horses. You should end up with something like this..

I understand that you are coming from a horse situation but I come from both a livestock and bloodstock background and when it comes to livestock you have to ensure that the bandaging and fertliser bag protection comes well up the leg to prevent dung and urine entering the wound.

If it was my weanling I would also spray the affected area with a 10% solution of Hydrogen Peroxide and allow it to bubble up and drain off. Then I'd spray it with a 10% solution of Iodine before applying the poultice.