My pups behaviour

Question
Hi a couple of weeks ago i got a Border Collie puppy.Her name is Molly. She was 8 weeks at the time that i got her but is now 10 weeks old. She has started biting everything including me and i have tried a lot of things to stop her doing it. I have put a toy in her mouth after she has bitten me and i just say NO! but then she starts barking and then she jumps at me trying to bite me again. there is times that she thinks we are playing and she is gentle but most of the time she is really rough. she draws blood from me. a few times i have just put her in her cage and left her for a while and she seems to stop biting for a we while but then it al starts up again.i really don't want her to be an aggressive dog with people or other dogs but she has been around me and my friends and my friends dogs too. i am just stuck on what to do to help her now.  Please help me.

Thank Claire.

Answer
It takes a while.  Young Labs, which I know best, and other puppies tend to very bad about biting. You see a litter of them, and all the ones that are awake are biting another one or themselves. I am not even sure they realize that when they are alone, if they quit biting, they would quit being bitten. At 3 to 4 months they are getting their adult teeth, and it seems they spend every waking moment biting or chewing. One thing you can do at that stage is to knot and wet a piece of cloth. Then freeze it. The cooling will soothe the gums. Only let the puppy have it when you are there to watch it. I maintain a Lab's favorite chew toy is another Lab. Otherwise they settle for any person they can. They keep hoping to find one that won't yelp, jerk their hand away, and leave.

You just have to keep on correcting them, hundreds of times, not dozens. Provide sturdy, safe toys such as Kongs and Nylabones. Avoid things they can chew pieces off and choke on them. Keep them away from electrical cords. Crates are essential for most young Labs and other dogs.

The pet stores are full of toys that many dogs will quickly chew up into pieces they could choke on or cause intestinal blockages. If you are not there to watch, stick to sturdy stuff such as Nylabones and Kongs. Keep a close eye on chew toys and quickly discard anything that is coming apart in pieces. Rawhide is especially bad because it swells after being swallowed. I don't trust any of the consumable chews. The dogs just gnaw them down to a dangerous size too quickly. These problems are the worst with, but not limited to, large, aggressive chewers such as Labs.