OH, MY. That sounds like it hurt. If you don not have the $$ for molasses, I am sure you can't get Nutra drench. That is what he needs. That would be really good for him, or some Arnica Montana. That is GREAT for being sore. I take it when I know I am going to be sore, or I am and it really helps. I would just watch him really well. If you do not see any improvement then he needs to go see the vet. He could very well have internal problems. If you see any blood for his nose or anywhere, then you know he has them. 3 days old, that is really young for such a hard blow. Or really you have NO idea that is what happened to him in the first place.
Lets say it did not. Did mom get her CDT 2-6 week before he was born?
Are you directing that to me? Her CDT?. That is a vaccine that they need. The mom needs it 2-6 weeks before she kids, so the baby get some. If you are not sure, you need to give it to them. It is only 2CC under the skin. Mom and baby both will need it. Now the baby really needs to be two weeks old in order for it to do any good for the baby.
All Goats should have it once a year. the baby will need it at two weeks, then 4 weeks from that and another 4 weeks from that.