I am so glad Gaston will have his own Girls.

Since they chose him, there won't be any issues about him trying to win over Theo's girls, and since he has quite a few already, hopefully Theo won't try to 'steal' Gaston's
The white leghorns look lovely, and have that characteristic stance and tail - but they look a bit more 'full bodied' than our American versions (
@BY Bob , do you agree, or is my perspective off?

) And your BCM are lovely, though I suspect
@RebeccaBoyd would say they would look even lovelier (especially give you are IN France) if they were FBMC - with the feathered legs!
I do hope all continue to thrive with your care. They do look quite content in their new surroundings - and I suspect it won't be long before the leghorns have fine tuned their take-off, landing, and flight path calculations!