I am new to Zebra Finches, I got a male and female from a friend with the intent to bring life to the house. Indeed it did. They are in a 42 inch wide, 22 inch deep and 37 inch tall cage. They quickly bonded and it’s been about 3 and half weeks. The male built a nest but they rarely sleep in it at night, both in and out during day. No clue why? Yesterday, I got another male and female. I have them in a separate cage but wanted to house them all together. I am waiting 30-45 days for a quarantine. Both pairs are bonded now. Would it be safe to house two pairs in that cage? I put them next to each other and the one male in the big cage seems interested in getting to the other pair, the other pair doesn’t care at all. I have a nest in each cage and when I put them together I would bring two nest in the big cage. Please help me, the stores around me are no help!