I would like to introduce a mother hen and her one month old Frizzle chick who used to be part of the flock -(2 Pekins and one white silky) The 2Pekins became broody together . Nearing hatch day I only had one egg going to hatch due to detatched air cell complications with the other eggs . So I separated the other two hens and I had to assist hatch the chick . The mother hen Astra is a wonderful mother but I am worried that they might attack the chick so just wondering what age should I introduce the chick and the mother to the garden again . I’m also worried about a neighbourhood cat because the poor mother has been in the aviary for three months!