I just bought a 1.2 group at a show a few weeks ago, and one of my females is about to pop already! I feed mine parakeet seed with a few kibbles of dog food and a banana bisquit every now and then and have a bird waterer that they seem to be doing fine with. I also have a small wheel and a tiny wooden house in there that they seem to love, with plenty of toilet paper rolls. Currently, they are only in a five gallon tank, but I plan on moving them up to a 20 gallon hi once the first babies become adults. I don't however, have heat on them. They are in our bedroom, along with all of our other pets, and it usually stays about 75-77. Would an UTH make them happier? Im not sure.... Also, how do you sex the darn things when theyre old enough to be sexed???? I mean, theyre so tiny already....so all of their little "private bits" have got to be even harder to see...