Rabbit's tummies should make quiet gurgling sounds.
If they become much louder than normal, it can be a sign of gas. If their tummies are silent, that's bad too because it can mean that their stomachs are in stasis.
As long as he is eating and acting normally I would just keep an eye on him. I have heard my bunnies tummies get loud before, but they where eating, acting, and using the bathroom normally still. If it was gas, it seemed to have passed on it's own. Be careful not to feed any gassy foods though - if it where me I'd probably just feed hay and fresh water until things where back to normal.
Something interesting - if you put your ear up to your rabbits stomach at any random time you should be able to hear their tummies making low gurgling sounds. It can be good to learn your rabbit's normal gut sounds, so that it's easier for you to identify any abnormal sounds.
If they become much louder than normal, it can be a sign of gas. If their tummies are silent, that's bad too because it can mean that their stomachs are in stasis.
As long as he is eating and acting normally I would just keep an eye on him. I have heard my bunnies tummies get loud before, but they where eating, acting, and using the bathroom normally still. If it was gas, it seemed to have passed on it's own. Be careful not to feed any gassy foods though - if it where me I'd probably just feed hay and fresh water until things where back to normal.
Something interesting - if you put your ear up to your rabbits stomach at any random time you should be able to hear their tummies making low gurgling sounds. It can be good to learn your rabbit's normal gut sounds, so that it's easier for you to identify any abnormal sounds.