Hate to hear about your ram. I use a blood test to preg check cattle. Closest lab is about an hour away for me. They use a testing procedure called BIOPRYN. They also have a test for sheep and goats by the same name. Look them up to find a lab close to you. Cost at my lab for the sheep testing is $6.50 plus about $1 for supplies per head. Not bad in my book. Splitting wood is a great way to spend time with your son.
I have never tanned anything. Although I have interest just not time or facility. But I have heard that you can use the animals brain and water for a tanning solution. That animals brain is enough to tan it's hide. Sure there are synthetic tanners out on the market.
We used the brains. And lots of salt. Larro