I have been collecting pardalis for some time now,and up untill the spring of 2006 had not attempted to breed.
I have been very lucky with my results and have eggs from the following localities.
Ambanja (hatching now,5 out in 2 days)
I have always kept myself quiet,studying the online resouces available and trying to gleen as much knowledge as possible.
During a visit to the Hamm reptile show in Germany i was asked how things were going by a well know colubrid breeder,when i explained my results,this guy told me that many years ago he breed pardalis and could not get them past F2 (meaning the F2 would not breed,they would mate but females would not become gravid)and that was the reason he gave up.
Thanks for the imput as i am very grateful for extra knowledge.
Please be aware that this is not the normal way to breed multiple generations...I just posted it to show that pardalis can be raised for more generations than two.... http://www.chameleonnews.com/interviewfer.html
"Larry Talent at Oklahoma State University successfully raised multiple generations of panther chameleons by giving his animals carefully measured doses of vitamin D3 with no UVB and I have no doubt that other breeders have figured out effective doses with veiled and other chameleon species".
The following sites talk about things that may play a part in reproduction (or lack of it)... http://www.anapsid.org/gehrman2.html
"It has been demonstrated that UVA can influence agonistic, reproductive, and signaling behaviors in some species of lizards (Gehrmann, 1994A) as well as inhibit growth in female panther chameleons".
"Ferguson, et al. (1996) present evidence that UVB may be more effective (than dietary D3) in promoting egg hatchability in panther chameleons (C. pardalis)."
" Jones et al., (1996) reported that female panther chameleons, C. pardalis, receiving low levels of dietary D3 or preparing to oviposit will behavioraly increase their exposure to UV light, compared to controls, in a UV gradient."
I suspected something similar to what Kinyonga posted. Veileds egg production can be effected by their diet. Perhaps he was having a problem there and did not realize it. I guess I am speaking a little ignorant as I do not know much about the species but it seems like a possibility. Diet can effect egg production in humans to.