The Google search for "duramycin goats" brought up a few answers for me. You can't refer to competitors sites on here, otherwise I'd pass you the link to the discussion instead of beating around the bush. There were some non-competitors in the results list. I can probably link to the results without breaking rules for you.
Snake bite is possible. There would be fang marks, but if too swollen, they would be hard to see. For snake bite I give my dogs Benedryl and baby aspirin every 4 hours. I also keep Arnicare pills and give that for pain. If a snakebite, the swelling should start to go down after several days to a week.
I'm glad the vet let all the gas out of her. I hope she feels better!
Been reading up on hematomas as well. the options of what this is remain a mystery. Feels like she swallowed a stump! It's hard and big as a softball.
She also seems to be bloating again. gave her b complex, duramycin. She is laying down which she hadn't done since yesterday. We shall see what the morning holds.
She does make the worst noises when she is swallowing.
I don't know what to say. I have no diagnosis, no words of wisdom, no experience with a similar situation. I know you love her and you will give it all you've got. You are a good goat momma.
She was bloated again yesterday when my husband got home from work. He successfully belched her, like the vet did. The mass is still there. Rock hard. No idea what to make of it. She has an appetite and drinks water.