Got some Platy fish from here a while back... aske...

Got some Platy fish from here a while back... asked for 2 females and was given a male but they exchanged it for me.
Later down the line however both of these developed bent spines and weren t well.
I had 7 Platy fish in total and the others were completely fine, only the 2 from here.
I ve read that bent spines can be due to inbreeding... ironic really because when my Platy fish had fry I asked if they d take any (for free obviously I wasn t looking for money) but they said no due to potentially contaminating their stock!