Zenmonkey
Songster
It is inherited, just as @The Moonshiner says, and as he indicates, you've already got a mix, so mixing a bit more seems harmless. If you line breed to that bird, you could potentially end up with a line of birds with 5 toes reliably on both feet.
I don't know what else it would have, depends on what you started crossing it to, and what else you selected for. Good luck!
I don't know what else it would have, depends on what you started crossing it to, and what else you selected for. Good luck!