Hello Daz if you look at our photos ( in my last post) you will see we have a big (2.4m sqr) avary with all the birds in together with 6 guinea pigs so that would be a colony i suppose. The mother would not allow the male past the nest's front door and she was feeding them herself.So went to a local pet shop and bought a heating cord to go around the ice cream container we have them in, and we are feeding them a high protein rearing formula we are advised to use.In the 6 days we have had them inside, 3 have been little pigs, eating until they nearly popped, and one - the youngest- came in but got very sick and stopped eating. pretty soon it's crop stopped emptying and its belly turned dark red like a bruise, and then he started passing blood, BUT the last two days he has begun to pick up and is looking for food and is pooing normally again. Looks like we may have saved the little life with some TLC, but he does have a rather extended belly.Thanks for the reply!