Just remember, there is a school of thought that says you should try to limit a female's diet as they become sexually mature (so from about 6 months). If they are fed large quantities of food, they may produce clutches of infertile eggs (i.e. producing eggs without having mated).
Please read this article:
Keeping A Female Veiled Chameleon (though it's specifically about Veileds, it applies to Panthers too).