Biter

I'm devastated - Jack bites! Dropped him off at daycare today and warned them he was biting me yesterday and to keep an eye on him and they tell me he bit someone last week..... I have one of those horrid little boys!! I can't believe it

I don't know what to do, I have been telling him "No Jack we don't bite" and putting him down on the ground and ignoring him for awhile but it doesn't stop him.....