Oh that leg is not looking good. Sorry to say, I did wildlife calls for a few years and regardless of if she is native or not I think she might be best put to sleep. That leg will not recover, it shows it's not got circulation, and a bad infection.
I'm so sorry, but so glad your showing her kindness. Have her to the Vet and see what they say. Pictures don't show everything.
I'm so sorry, but so glad your showing her kindness. Have her to the Vet and see what they say. Pictures don't show everything.