I follow a slightly different feed regime, and do 1.5 lb a day at 8-12 weeks, 2.5lb a day at 12-16 weeks, 3.5 lb a day at 16-18 weeks, then 3 lb a day from 18 - 24 or thereabouts. Split into two feeds. Up it or down it depending on how they look, nice covering, but being able to feel the spine and ribs still is what I aim for.