I don't agree with breed as there are too many unwanted birds already.
As for the toe, I have also have a Senegal parrot who's missing most of one toe nail, his toe's formed pefectly but it's like most of his toe nail was ripped off at some point. I was told at one point it would grow back but it never did, doesn't seem to many any difference to the bird's ability to climb though.
The deformed toe may be a genetic problem that could pass on if you intend to breed though.




