They got tired of being the lonely GV'ers late night items of affection, so they headed over to the airfields and are now hiding in the backs of the buffs.
So when your in a fighter and approach a buff from the 6 position with guns a blazing and you do not take return fire, that is not a noob flying that buff, it is a vet who's Gunning crew found the hiding sheep and is showing them that Buff crews get lonely on those long flights also.
I think the sheep prefer taking the 50 cals and 20mm's from the fighter up the rear better then what the Buffs Gun crew is giving them!!!!