As I am sure you know, ...
mini lops, are a "designer breed" ,"relatively new" ,and bred for the pet trade.
It takes a long time, and ruthless culling of breed stock, to remove "undesirable traits", when creating a "new breed"...
Unfortunately, many, if not most breeders, breed rabbits, they should not breed.. to keep cash flow coming in...
"Meat rabbits", have had hundreds of years ruthless selection, so [commercially speaking]there is far less "undesirable traits" in those breeds. However "backyard breeders", often create problems, and then breed them, and then sell them for "breed stock"...-
All you can do is.. select the best, and only breed those rabbits..
keep good notes, so you know what crosses ,or individuals ,throw "defects".
I am sure it will still make a "lovely pet" ...
and... Best of luck...