Modern gilt feeding methods – does it pay?

I have just completed analysing the farm records from some courageous breeders who bit the bullet several years ago and adopted the advice on upgrading their gilt feeding which appeared around 2004. I have just completed analysing the farm records from some courageous breeders who bit the bullet several years ago and adopted the advice on upgrading their gilt feeding which appeared around 2004. This was to move away from the conventional growers diet fed from final selection at 100 kg to final