For those that have not experienced it ....
Prolapses can occur at almost anytime, with any sex. While a female chameleon cannot suffer a hemipenal prolapse, they also seem to be more prone to cloacal prolapses, if for no other reason than that so much more is expected of what happens via the female cloaca. As noted, they can be quite random. Sibling animals, under identical husbandry conditions ..... one prolapses and dies. The other lives a long life.
In further explanation, it is one thing to suggest that a knowlegable vet may be able to provide some insight. It is also one thing to say that such a vet may be able to suggest husbandry changes. To conclude that it is likely, or to "think" it the cause, is quite a leap, even for a vet.
Jacqui, you caused no friction. Some folks are exceedingly quick with a keyboard is all. Happens every day in the Forums.
You got some very good advice from some members here. Soaking is always a great first reaction. Topical antibiotics will also help to keep infection in check, and also help to lubricate. Vet visits may be within your means. Maybe not. I can sympathize with the economics of such.
Licensing keyboards would be akin to censorship, and I am, in the end, a Libertarian at heart. But sometimes I wish
