I have fenced garden and need to do some work. But if I take chicks out to chick pan, I can't to do yard work. So I'm thinking to bring chicks to my garden while I'm weeding. But my garden fence has about 2"x3" rectangle openings and about 3feet high. My chicks are regular sized 4.5weeks old chicks. Are they able to sneak out from the openings?? Or they will be busy to peck and don't care about sneaking out??