I too learned the hard to never have them drink anything in a vial. I may be losing out in some cases, but I practice the "rather safe than sorry now." LOL.

I had one male villager born with an inclination for healing. So, when he turned 14 I started training him. He was infuriating! He'd learn okay, but as soon as he increased his healing skill he'd want to relax, swim, do laundry, etc. He'd want to do anything else but learn.

However, when he got a bit older he settled down and turned into a full Master Doctor. He was great! So, I learned from that and now I give them all the benefit of the doubt.

A vial that makes them master breeders? What a nightmare sfrose!