I have never seen a living animal with a wound like that. Yes, from the condition of the arm bones, she would have lost the flesh a day or so previously. And the poor cat was so calm too.
My sentiments toward her 'owner' are not printable. She should be prosecuted for cruelty to animals and neglect, or both.
My sentiments toward her 'owner' are not printable. She should be prosecuted for cruelty to animals and neglect, or both.