No, actually, it's caused by people breeding animals together knowing that they have a lethal gene, and risking these to get the babies that, like the parents, only carry one copy of the lethal gene. It is possible to avoid peanuts altogether, if you breed true dwarf to false dwarf, though the false dwarfs can't ever be registered.
I have heard that breeding two "true dwarfs" together is actually illegal in one European country, as is any breeding that could result in the death or prolonged suffering of the resulting offspring. There is also a limit on how long the ears of English Lops can be, since damaging their own ears by stepping on them is possible, and that is considered suffering.![]()
I would agree with that. There were only 3 kits in the litter. One deformed, one peanut and one normal. It was very sad. In Europe they don't clip dog ears. It's considered mutilation and very painful for the dogs.