I'm a sorry for your loss. I'd recommend getting better educated about horses before getting another one. If that seems harsh then I am sorry for that too.
You said this horse went down on Sunday. You came to this board on Tuesday. The vet should have been there the second that horse could not get up not trying to call two days later. If I am misunderstanding and he was there on Sunday, you should have called him again when the horse went down.
If the horse was showing signs of weakness and illness it should never have been in the muddy area where it would have risked falling in the first place.
Find a local horse facility and volunteer there to get more experience with horses. They are certainly the best thing a person have but you have to really understand what it means to take care of them.
I did not wait until Tuesday to talk to the vet. When I came to this forum he was already on meds for two days. I was just asking for advice on getting him up. He did not show signs of illness before he went down. He was not in a muddy area where he fell in the mud. It rained for three days and was to wet to drive back.
I thought you had said he had been down since Sunday. I saw that the vet had given you meds and instructed you to try and get him up. But two days of the horse being down (which is what your post seemed to insinuate) was too much and the vet should have been called right away to get out there and get the horse up.
How could he not be in a muddy area where he fell in the mud? There's probably more details then what we've been told and maybe that's why it seems questionable.
I would most certainly not work with the same vet. That guy should have bent over backwards to get to your horse with such a serious situation.
I am really sorry for what happened. It just seems like something could have been done. It's a tragedy.
I agree with farm pony, you could not possible no what internal damage your horse could have had with the neglect & or abuse it received. Please do not feel responsible for his passing. You called the vet in a timely manner and followed instructions. It may have just been his time to go.