I saw Jersey Giants pullets at the local Agway and thinking of them this weekend. First, they told me they can be outside during the day but should still be inside at night. Not sure how old they are but they are about 6' tall right now, will ask how old when/if I get them. Should they have a heat light inside? When will they be fully feathered to be outside. I have a quarantine section for them with a small hutch before they co-habitate with my other 2 hens. And big question. It does say hens but not guaranteed. Any way of really telling yet by looking at them. I do not want a cockerel. Thank you!