Ball Python Regurgitated...

[Aerries]

I have a ~7 year old BP and today for the first time, he regurgitated a meal. It was a normal sized rat.
He regurgitated it sometimes between immediately or 5-6 hours after taking it. I didn't see it go all the way down then i came back 5-6 hours later and saw it in the viv.
I am quite worried but i am hoping it is just because i filled his viv with new, damp coco coir today and it usually takes a day for humidity to settle and perhaps also a while for the temps of his basking spot to come through.
I had him out earlier in the day when i was changing the coco and he seemed perfectly fine. I've not taken him out or examined him since he regurged, but he seems fine. When i took the rat out he still had a feeding response so i had to push him away with a cushion, otherwise i know he'd have went for me my the way he was behaving.

What do you think? Should i be worried or just try again in a few days when the humidity has settled?
The rat btw, after regurgitation, looked just like new and i didn't get too close, but it didn't smell bad either.

I'm no perfectionist but i would wait 1-2 week before feeding after changing the terrarium stress is bad


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