why not darken distance birds at end of day darkness dnt make you win races it puts them in top body condition to be capable of winning races.surley birds in full feather weather it be sprint middle or long is better in the air than rag dolls.how do you exspect a yb which is still growing to moult and give 110% in any weather on a race day if they like rags,my opinion you cant hence why so many losses,give your ybs the best chance you can