If they haven't eaten for you or if you have not personally seen them eat - consider them not eating - you'd be surprised at how many imports are "eating" but when they reach their new owners all of a sudden develop problems. Hopefully you lucked out but I find it hard to beleive that they've only been her a couple of weeks and are feeding great.
Get them thouroughly vet checked - run the gambit of tests - you do not want to risk exposing your collection to anything they might be carrying. Get them settled in and feeding - out of the 20 you may actually get a couple that may breed this season - but don't count on it - it may take a few years.
Good luck with them!
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Tosha 
"One of these days i am going to wake up..look around...and realize my place looks more like "Ace Venturas"s than my own." Coldthumb
7.33.0 Ball Python (Harry and Fluffy and gang)
1.0.0 Angolan Python (Skywalker)
0.0.1 Green Tree Python
0.2.0 Feline (Pippen and Pandora)
0.0.1 Dessert Tortoise (Pope John Paul "JP"
2.2.1 Fish (1,2,3,4)
0.0.2 frogs rescued from pool skimmer
0.0.1 lizard rescued from vicious feline