Good for you mate.
Nice to see someone considering the consequences before they breed
Do you go ferreting Droid? Because if you do, then you would realise if you have a very good line, that you should keep it going. If it means keeping a few, and killing the ones which arent to your satisfaction, then so be it. Thats how the extraordinary ferrets are bred.
Id spose the young lad does have a point, culling has and still does have a very influencial part to play in producing the best workers in dogs anyway and I presume the same applys to ferrets. Im not saying I agree with it.