bunnies tummy making noise?

My bunny is moving around, eating, drinking, and pooping normally but I noticed this sounds coming from him. Is like a growl like what our stomachs make, but he's been eating all day. His diet has not changed. Nothing had changed and I've had him for two years and he never made this noise. He wasn't making this noise a few hours ago. I want to know if it's normal. And there are no vets for bunnies around here. There is only a dog vet and they do not take bunnies. I have no transportation