I have had prior animal breeding experience in breeding & culling. Holland Lops (which I breed for awhile have an AMAZINGLY high cull rate as the dwarf gene is homozygous lethal). There's an easy solution to reduce the 50% adv cull rate; use bigger does & the small typey bucks. You don't produce as many champs that way, but you do reduce the culls down to about 1 in 4. To have culling be such a normal event is one of the reasons I got out of rabbits.

Working with snakes, proper husbandry results in way less culls. Before I bred snakes I discussed with my herp vet who also keeps snakes & other reptiles, the best way to "put one to sleep" so I'd know. And freezing is the method I use here if need be.

I do pick my morphs based on what I think I can handle. I pass on T+ Albino projects although I love the morph. But even being selective, you get tangled babies, you get minor defects... and you get freezer pets as Kevin at NERD calls 'em. I've had 3 culls to date, but they all were for the best interests of the animal.

I will not hesitate to cull, I also will give an animal that has the ability to feed/function/defecate a chance. A local friend brought in a spider, a one-eyed snake that also had some kinking- "Can you help her?", he said.

I told him we could try. After 2 assist-feedings she defecated & peed. She also lost most of the kinking that was from being tangled. After 3 months of assist feeding she began to take FT off tongs on her own. Her name is Alli & she is his daughter's pet.

I will say Alli was in such bad shape that, had she hatched here, IDK... but helping someone else I did see 1st hand just how resilient these babies can be. It's given me a better idea of what can & can't heal. So if I think an animal has a chance I'll give it- but I won't let something suffer that has no chance either.

It's a tough call, but one as a breeder we all will have to face.