That tar/mud is definitely sucking the shoes off, so bell boots won’t help it (sorry!). I don’t know of anything that will help, but I really hope there is one!
I’m a Cloudline member and servant/caretaker to a retired Cloudline hound, but I’m currently located out of state so I don’t get to go too frequently. I do have to return a horse I borrowed so I will there for the hunt on the 24th.
I highly recommend joining Cloudline because the people are superb (I LOVE Susan!) and the hunt is crazy fun if you don’t mind getting a bit dirty. The mud was so bad this year that a couple of guys ended up at a car wash to clean their tack between days at the hunt ball weekend. Luckily, the horses typically come out sound from even the fastest, longest, and muddiest hunts.