I also posted this on the General Boas forum

[d-monster]

So these past couple weeks I've noticed something really wierd. I fed my snakes like any normal day, except for my boa, she had been off feed for a couple months. Last week I checked on my IJs and BP that fed, all three had regurged and in a couple days they died. That really freaked me out, I don't know why it happened. My temps are all good and they have paper towels for sub.
My wife gave me the idea that it might be the rats that I had fed them. I honestly didn't think anything of it since it had never happened before, but now last thursday, my boa just started feeding and today I see that she had regurged as well.
What could be happening? Could this really be the food, or is it something else unseen by the naked eye?
Please, Please, Please help if any of you know anything.

[Zombie]

Are you feeding live or FT? If feeding FT maybe the internal temps were too hot? Or still frozen? Only thing I could think of why they regurged...

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[snakesonaplane]

Definitely sounds like a food issue, perhaps parasites that dwell in the same rat batch. That, or some sort of chemical that was in the packaging or the rats might have been treated with antibiotics, which are usually lethal to snakes. I would take your boa to a vet immediately for safety reasons. Sorry to hear about your loss.

[rgalanti21]

Where do you get your rats from? Online or a local store? (If online, which website?)