I used to own a pair of lutino fisher lovebirds. I also owned two English budgies. One day I come home from work and discover my budgies dead and a trail of blood in their cage. It turns out my lovebirds know how's to get in and out of their cages. I discovered some blood in their cage too. It is my belief that the lovebirds went on the attack and killed my budgies. Yes I have seen my lovebirds getting in and out of their cage, when I was not in sight. Actually helping each other out. Beware of your so called lovebirds.