Genetic related wry tail? Or just previous environment?

[NatJ]

Her tail is almost always streamline with her body so it might have been due do her past environment. Her brother also has a new tail he's growing and it's generally always straight as well.

I was just thinking: this looks like the answer to the original question in the title of this thread. Since the tails did straighten out in a new environment, they were probably crooked because of the previous environment. Obviously the genetics of the chickens did not change when they were moved to a new home.