I’m so sorry that you’re going through this with your animals, @dickwaltzingmatildabruskin. I do suggest that if you have a regurge, you wait 10-14 days before offering another meal, and then offer a meal which is a couple of sizes smaller then usual. If that stays down, in 7 days offer another meal, slightly larger. Repeat until the snake us feeding as usual. If they regurge again, go back to step 1 and proceed more slowly.
Regurges are much harder on snakes than vomiting is on humans. Think about how long the swallowing process takes; reverse this, but with highly acidic fluids in contact with delicate tissues. Feeding before the damage is healed and digestive juices are renewed makes another regurge highly likely. Repeated regurges can lead to all sorts of problems, up to and including death.
I am not saying that this is what’s going on with your snakes. It certainly doesn’t explain why they’re having a regurge initially. It’s a suggestion to help them recover from the regurges, hopefully without repeating them. .
Drosophila and Phorid flies are VASTLY different animals and the prior would have no interest in a dead rat as they feed on yeasts. Regardless of what is going on with your animal, the presence of Phorid flies is something you should definitely address because they can be a problem in many many ways (not just the extreme version in the horror story from above)
Now… Off to read the rest of this thread and see if I can help with the issue at hand
You say you have ruled out the first and the epidemiology would imply one of the latter
Have you used any kind of insecticide on or around your animals? Even in a proximal room? This includes things like flea powder, No-Pest strips, Nix, Frontline spray, etc…
What are your feeders and how do you prep them? Do you ever refreeze? If so, how many times?
Shooting from the hip ( e.g., absent any dif/diag), I have heard a lot of reports of Coccida outbreaks in collections recently. Treatment of choice is Toltrazuril, but I do not know dosage and you would absolutelt need a compotent vet for that info
As for your previous vet no longer being available, is there any kind of agricultural college near you? Often they will make the vet students there available for atypical animals as part of the teaching experience. Might be worth checking something like that
As for possible toxin exposure, do you burn incense, scented candles, use air plug in fresheners, or have teflon coated pans you cook with? Or use strong bathroom cleaners near the same room as the snakes?
Do you have CO monitors in the same room as the snakes?
Off the top of my head those are potential environmental factors- I am learning that reptiles can have very sensitive lungs… or lung, as the case may be.
