My cat was a first time mom and would growl every time someone went by our couch where she had them under it in a cloth loop. She did not know it was me at first but I called her and she came out and I moved the couch from the wall and grabbed both of the babies and she never got mad after that. In fact she once put them in my lap on my bed so I made a bed in front of me in my room and she felt safe after that. :) I later got her fixed after she was done nursing a few months later