I'm sitting with a Rex/NZ doe and a NZ White doe with a NZ white buck. Currently at 12 weeks and only 2lbs

I'm feeding like crazy (free choice pellets 18%, fresh alfalfa, some clover and dandelion cuttings and a few sunflower seeds to the does to boost protein). But I have a colony that's apx 8x10 so I'm wondering if they're getting more exercise than 'normal'. I've also started to 'baste' their pellets in canola oil and then coating with DE in case they have any worm issues (original hypothesis for their low weights.)
What I've realized though is that they weened much younger than they should have because I was allowing the buck to stay in the colony and the does were rebred immediately after they kindled. Long story long, I've sold my buck for the time being and hope to approach it differently the next time. Very interested to see what you all are up to with butchering weight/age/breeds!