Thank's everybody,
bigger female takes cricket in one second when I put it just front the nose and eat in some seconds, little female need some gentle stimulations and after 20-30 seconds she opens the mouth and take the head of the cricket, she keep the cricket about 45 seconds and after eat quickly ; the male is more shy and need very smooth and short stimulations two or three times but once cricket is taken he eats in some seconds too .
They are young geckos born 2007, with fat tails and well hydrated who had got the minimum of stress during the transport, perhaps perhaps perhaps !!!!!!............ but I know it would be a real challenge.