Four hours is not a short trip. Having spent many times riding in the trailer with a sick horse or foal, it is non stop, weight shifting, balancing, and it is loud and it is stressful. I would not do that to this horse who is in such a weakened state. I am sure the rescue has the best interest for him, but I do not think it is a wise decision. The poor horse can barely manage to stand and walk in a stall.
Totally agree!
Is there a reason he can’t stay where he is longer?