Not only that, but at 2-3 weeks old, most of the hard work has been done. I generally either sell them at a few days old, or rear them to fat weight. I guess if I had way too many one year I maybe would sell a batch that are established on the bottle-rack or multi-bucket - but I'd want quite a bit for them as I'd have done quite a bit of work to get them to that stage.
I generally start to wean from 5 or 6 weeks, so long as I can get them to eat creep. I don't stop milk altogether until they're eating at least half-a-pound of creep per head per day - but sometimes you have to let them be hungry in order to push them to take the creep
, so I generally have them on two bottles a day by 4 weeks old. My milk mix is a 1L/head/day (max) one, so two full 500ml bottles is still a full ration, just they will get hungry between feeds so will start to eat creep, and will munch the hay or grass, whichever they have available.
If they're eating creep, but not enough, and are 5 weeks old or older, I'll reduce the amount of milk to stimulate their appetite for creep. I reduce quantity of milk rather than weaken the mix, so their tummies don't feel full - they often go directly to the creep to fill up after emptying their partial bottle.