Lads with a really good working Jill, at some point will want to breed to keep the line going.
the problem is, ferrets usually have big Litters, which means a glut of Kits looking for homes.
The Lads that have been working Jills for years and have developed a good strain, usually wont have a problem, as these Kits will be sourced.
The problem is the Lads new to the game and breeding off Jills, that have only seen one or two Seasons work.
maybe more need to use a Vasectomised Hob, or Jill Jab, or don't let your Jills near a Hob.
Or if you need a replacement, instead of breeding, bring one