Goodness, she was a pretty little thing. We all make mistakes from lack of knowledge and experience. Now that you have Nino and because you're older, you know how to control the behaviors that she was displaying. You shouldn't feel bad. You tried to give her a chance. As a matter of fact, I made plenty of terrible mistakes with Lucky, but that's an entirely different topic. Layla was a beauty and I'm sure things will be better the next time around.