i went on a few loft visits in holland about 10 years ago.i asked at each loft,how long do you show your hens for on the long races.they all said the same about 40 mins to 1 hour so the cocks had tread the hens.they are more relaxed when in the baskets.try it on races when you basket two or more days before lib..........regarding the feeding try the high fat mixes for the last week.bamfords do a good one,and also had a look at bucktons and it also looks good.