Help?

I have a pair of Crested Geckos, both about 2 years old..
I got the female from Painted Python and the male from Pangea Reptile..

The male used to eat CGD and Crickets like Noone's business..
The Female used to eat CGD like Crazy said Painted...

But theyre temps, Cage and everything is PERFECT, But theyre like a picky BP, They are SOOOO picky.. And theyre loosing a LITTLE wheight.
WTF!!!!!! Help?! :'[

they have bought out new flavours in the one part CGD you could try one of the different flavours to see if it works :D