mastiff pup

Question
hi just wondered if u could help. i have a 6 month old french mastiff i also have 3 children who she gets on fine with most of the time only sometimes she is jumping up at my 9 year old and and biting it seems to me like she is just wanting to play but with her being such a big pup it is making my little boy a bit nervous another thing she keeps doing is peeing in her bed how can i stop these things.

Answer
What he is going to have to do is yelp, jerk his hand away and walk off every time she does it.  When she jumps on on him, he needs to step backwards.  

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.

With somebody the right age in the family, 4-H dog training is a great idea. In my area, clubs form soon after the first of the year.  Even many urban areas have 4-H.  For info look in your phone book under government listings for extension or cooperative extension offices.  Ask specifically about a dog or canine club.  The dogs see all the people and dogs in the household as a pack with each having their own rank in the pack and a top dog.  Life is much easier if the 2 legged pack members outrank the 4 legged ones.  You can learn to play the role of top dog by reading some books or going to a good obedience class.  A good obedience class or book is about you being top dog, not about rewarding standard commands a treat. Start at http://www.dogsbestfriend.com/
For more on being top dog, see http://www.dogbreedinfo.com./topdogrules.htm  That site has additional pages on dogs and children.  

I need more details on peeing in her bed.  The obedience training will help if it is a matter of leadership.  You may also need to take the water up at 7 PM.  A vet check won't hurt.  It is time to spay her.