Thanks everyone! Well, so far, so good. The vet walked in, kinda slumped against the wall and said, WHEW, WHAT A PROLAPSE! I was terrified until she said how good he looks otherwise (he was drinking off the plant I brought with us this afternoon) and said she wouldn't offer me the option of surgery unless she really though he had a good chance, which he does. I am really proud that I acted fast and have done everything I can to help him. She said they have had a few chameleons in Today, but normally, in general, they never look as good as Ryan. So he is in for surgery as we speak! It's definitely rectal/colon tissue but it's alive so first she will anesthesize him and try to stick it back in, but may need to cut the external part off and re-sew the inside part to the vent.
We DO now think we know what caused this, and yes, it's my fault: I think I fed him too late one day and early/regular the next and he did not eat all his food the first, late day. Then he gorged, without me knowing there was food leftover (I glance, but obviously not well enough), and ate his regular ration. So, I will commit to being insanely more diligent about feeding times, amount fed, and checking to make sure there isn't easy prey left in a dish/feeder/flat branch I have in there.
I am doing everything I can to make this right. The vet will have to stay late tonight, he will be there over the weekend for pickup Monday if all goes well, and the High estimate was $1,834. Which is like, Hallelujah compared to 3-5k. They had me pay half, which was more generous than I could ask. They brought him out so I could tell him I love him and say see you soon (which I am sure he hated)
I know there are very real risks of him dying under anesthesia, and that the internal stitches could burst and make him septic, and this prolapse could happen again. However, knowing I am doing all I can for my little buddy...there is no price you can put on that. I am very happy with everything so far. I also grabbed a bunch of pamphlets on pet health insurance!!! Let it be known I have 4 kids, a horse, a pony, 3 goats, 12 chickens, 12 turkeys (Anyone want some turkeys? PLEASE take some), four cats, a corn snake and of course Ryan. I haven't had a big vet bill in a loooong time, but it may be worth insuring say, the horse, Ryan and maybe the older or more mischievous of the cats.
They requested I bring him silkworms up tomorrow morning and said only soft foods for a while!!! Hoping he pulls through surgery and he is ok!