You obviously realized that this wasn't the best idea or you wouldn't have posted, but you've got the wrong mindset about the possible outcomes.
The problems that will surely arrise are not because of killer instinct, agression or cute personalities. These geckos are simply hard-wired to survive and as such, they don't know what cannibalism is, nor do they care about what makes sense to a human.
If the younger gecko is small enough to swallow, even if it's the same species, it's prey...not a cute baby or a little kid. Cresteds pounce and bite first and then decide if it's something they really want to eat.
On the other hand, if the other gecko is too large to swallow, it will be unnecessary competition for food...not a neighbor or a friend. Like any other animal, the gecko will not share its food with another animal if it doesn't have to.
Again, this has nothing to do with personalities and everything to do with their natural survival instincts.
Just my .02
-Anthony
>>Hi
>>just wanted to know if anyone has witnessed cannabalism in cresteds, ie: older eating younger. i have a 8/9 month old pair but have recently bought a little yellow 2/3 month old (if even).i want to put them all together. I know there may be some aggression as it matures (if male)but as far as cannabalism goes, i don't know. it doesn't seem to fit with their personality but i'm unsure. I have a juve Leo as well and tried getting it a buddy, albeit a lot smaller and after a week of tolerance, HE ATE IT!. Cresteds don't seem to have that "Killer" instinct but i'd like to hear if anyone has tried something similar.
>>thanks
>>Brian
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Anthony Caponetto
www.ACreptiles.com