I think both are true. the spring and early summer are recuperating times. then comes the building on for the up coming winter. So whether they bulk up on the good groceries in the winter or the following spring and early summer in all leads up to a healthier animal. year around plots that fill the bill, such as strip plots, would be the best way to go. I would suspect that good winter, through the fawning period, eats may lead to more twins and triplets. good summer eats gives them a head start into winter and so on and so on and so on. Bucks don't eat as much during the rutting periods so getting a head start going in can't hurt, which is the spring summer foods.