I saw him trying to get into his hide and then reel back, I think this was at the point of his regurgitation. The rat came back up exactly as it went in! I don't think it's a full regurgitation, more like a spit out like another person posted.
It's been a few days since then and now he is dancing up and down the glass which I take that he is hungry, which is ironic really because when I was trying to fatten him up he was so lazy we never saw him but he ate well and just chilled! He's more active now than before but I put that down to almost 3 weeks of no food. This includes going 'into blue' then shedding, then the spit up around 5 days afterwards. I have one more large weaner rat to give him which I will do in the next few days, and then will increase to small rats, at that point I will reduce his feeding to every two weeks.
He isn't going to starve to death because he is a snake (and looks significantly healthier than previous) and also I don't want to overload his system, it's been over a week, a couple more days won't hurt him I don't think!
I did check his eyes with a torch as another suggested and they look clear. He has shed twice since I've had him with very little problem.
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