Baby Bump

I was out following Gossip around today (yeah, trying to catch her, shut up) and at one point her stomach started rolling and jerking. She wasn't doing anything of note and it went on for over a minute with me staring at it like a slack jawed fish before I thought to pull out my camera and by then it was stopping. So what you see here is the very end and mildest of the movement. What do you think? Baby?

Background: This is a brand new rescue mare. She has had two foals previously and has spent the last year running with a donkey stallion. She has not be vet checked for pregnancy yet, but that will happen this Friday.