y b,s especialy deheydrate a lot quicker than ob, ,i remember , to my disadvantage many years ago ,i trained a few members birds in a transit van ,mine were basketed first,, by the time i got round the fanciers to pick up their birds , blether, tea etc, it was allmost 6 hours b4 i arrived at the tossing point , the last birds basketed done this toss in an hour ,about 50 miles,on a warm day , mine and the others basketed earlier had a bad toss and returned with mud on their feet,,,lesson learnt,,, allways have drinkers on the baskets,and allways have them well basket trained to drink ,,,,,once bitten twice shy