My thoughts are:
C/D anti-toxin, treatmentment amount on the label for goats is 10 cc sub-cu
B complex, or straight thiamine if you have it, depending on his weight, about 2 cc's
Penicillin OR tetracyclene - NOT both, they don't get along in the system. Whichever you have on hand. Good size does of either, maybe a little IM and a little SC. I know some even use penicillin orally, and claim to see good response with it. I have not tried that method - maybe someone else will comment on that.
Probiotics
Baking soda, table spoon or so, mix with water so you can drench with it (helps the pH get back on track)
Banamine, will help with the discomfort and fever if he has one.
If anyone else has something to change or add, please do. My ways aren't the only ways.
Good luck, Mark.