fur pulling-poss mites!

My Benny is going bald!!! He has started pulling fur from his chest and belly, i've seen him doing it and it has started just today. he is also scratching alot so i'm asuming mites! his skin doesn't look sore but is a little flaky but not like i've seen in previous mites problems. I am just amazed as I've never know the fur pulling! and it has come on so quickly. He was fine this morning and now he's one balding bunny! I'm taking him to the vet in the morning and hopefully get him sorted. just hope he has some fur left by morning! bless him!
has anyone else had the fur pulling?