Our Mini Nubian goat, Porter, is fighting Polio / Listeria. What signs did we see?

Oh my where to start. Jason herd him screaming Friday around 2 from the house. He went outside and he was laying on side and couldn’t get up. He got him up and moved him under a shelter because it was pouring rain. He ran in and called the vet, loaded him up to head to the vet. When he got there the vet diagnosed him with Polio. He was given a 40% chance of survival.

Our goat did not have any of the normal symptoms of goat polio, no fever, no circling, no noticeable sight issues, no isolating and he had been eating earlier in the day. When the vet went to do an assessment