20kidsonhill
True BYH Addict
Since you mentioned giving Penicillin to another goat, and you have the supplies, I would give this one some as well. twice a day. It does not actually decrease the parasite load, assuming that is the problem but it could help with toxins building up in the system from the goat having a parasite load or maybe another infection that is going unnoticed.
It probably feels a little overwhelming right now and I am sorry that your little guy is losing to this. I think you are right to take in a sample of his along with some from your other goats to have a test done. And I second the going ahead with the cocci treatment too for all of them.