Slight highjack.
But is not one of the reasons sites like this exist, is to counter the disinformation that shops give out?
Actually, to my knowledge, no major farm in the US is breeding guppies on a large scale.
They are all imported from Asia.
And when they are imported, they are shipped in bags of about 200 fish, dosed up on tranquilizers.
What most folks do no know is that less than 1/4 of guppies that are shipped in, make it into home aquaria.
Most die from the tranquilizers.
It is POSSIBLE, that they are steril from the tranquilizers.
However, I have already stated what I think the probable cause is eariler in this thread.
Drake, this is not an attack on you or where you got the guppies.
Dino