tummy stretching

I've noticed Ralph doing a lot of tummy stretching recently, where he seems to stretch the round bit of his tummy down to the bottom of his body and back up . Really hard to describe, but if you imagine a rabbit's main torso is like a cylinder, it's like a round bubble running down to the bottom of the cylinder as he stretches and then coming back up and spreading evenly amongst the cylinder so it's not a bubble anymore.

Do you know what I mean? Is it normal? He doesn't seem to be in any pain and he's been doing it to varying degrees for months...But after I saw the bloat pictures of a bun on here, it reminded me of that, but very fleeting rather than permanent.

It may just be a normal stretch, but once mine do this sort of stretching,or pressing their tummy to the floor I swing into panic mode!

Maybe its worth looking at his diet to see if there is anything in their giving him a gassy tum,like brocolli?

Yes, that's what he does, pushes his tummy on the floor... he doesn't do it for very long though. Maybe too much gas... I should cut down on the brocolli. He still eats well though, always has an appetite. That's good isn't it?

I'm paranoid I know but I'd have him to the vet just in case.