I have 7 lucky reptile cages for breeding, I use 1 male to 4 females, I have a couple of rubs for growing on as I like to separate the males from the females. I feed my ball pythons on a 50g to 60g approx asf weekly and they put a lot of healthy weight on due to them not been as fatty as rats ( hence the smaller size ) you cannot add any adults to established breeding colonies, but you can add young to a different colony for whatever reason with no problem. I feed mouse food and wild bird seed, plus fruit and veg and any bread that's going spare. i wean the young between 24 to 28 days old as there is usually another 1 0r 2 litters on the ground, they are very prolific breeders 10 to 20 young per litter but this drops off to about 10 young on average, when the litter size start to drop off I sort another breeding colony out and put them in a 9l rub for a couple of weeks until I kill or retire the the old colony then transfer them to the larger cages. I have started feeding my green tree pythons asfs and they haven't missed a feed, so I'm quite happy, oh I should say ive been feeding my ball pythons asfs for about 3 to 4 years and they are growing and breeding very well. hope this helps.