Herbalist needs more recipes

I have had (and I don't know what it did) just one beaver become contaminated during bad water since figuring out what i need to do to keep them safe. And I couldn't figure out how to get the antidote to the contaminated beaver anyway. So, it makes the herbalist almost useless. However, I seem to have 2-5 injured beavers all the time (had three beavers get injured in one day!), and bringing back a medicine recipe, and its use in medical beds would at least make the herbalist a little more useful. Thanks for listening