When a veiled produces eggs will she throw gravid colors, even if she hasnt been bred. just curious as this would be a sign to prevent eggbound females
They usually show gravid/non-receptive colors at least part of the time they are carrying eggs...but its not indicative of eggbinding.
Eggbinding is most often the result of poor husbandry and failure to provide a suitable place for the female to lay the eggs. There are some "physical" causes as well...eggs too large to lay (usually from not providing a suitable place, disturbing the female when digging, etc.), fused eggs, reproductive system deformities, etc.
Its important IMHO to have an opaque container of washed playsand in the sexually mature egg-laying female chameleon 's cage at all times. The minimum size for the container should be about 12" deep and big enough that when empty the female fits into it with a couple of inches to spare on all sides.
When the female is digging, do not let her see you watching her or she will abandon the hole.
Some signs that the female is getting ready to lay (include but are not exclusive to) roaming the cage, eating less, drinking more, increased girth.
Signs that she might be eggbound (include but are not exclusive to) sitting low in the cage, not eating, eyes shut during the day, may have dug a hole but not laid the eggs (and maybe filled it in), lethargy, etc.
If she shows signs of being eggbound its important to get her to the vet ASAP.
IMHO, yes...they don't always lay at the exact date that people expect them too....so why risk it?
If you don't happen to breed her at the right time during her cycle she may produce mostly infertile eggs and would be likely to want to lay them earlier than the normal 30ish days.