I have a nine week old Setter puppy and she has settled in to the family very well and she is doing extremely well with toileting too. My only problem is her biting! I dont mean mouthing, I mean Biting!! If she isnt asleep or eating, she is playing which is good but if she doesnt have or want her toy(s) she will bite anything, especially hands, feet, legs and clothes! It isnt just a nip, she has drawn blood three times so far! She sounds so vicious too when she does this. I try to distract her with a toy which might work for a second or too then she is back to trying to bite again. I have noticed that this happens more in the evening when she is getting tired but she can and has been like this at other times during the day. Can anyone suggest anything please as it is making life with her difficult! I love her to bits and want to sort this out asap. Thanks.
clearwater2860@hotmail.com

This article is very helpful.

As you've noticed, she gets worse when she's tired - just like children, eh? ;) The trick is to allow them 'time out' before they get overtired. The calmer the household, generally the calmer the puppy.
:)