I have a 10 and a half week old Miniature Schnauzer and over the last 2 weeks has settled in really well, not too many 'toilet' accidents and sleeping well in the night and also getting used to being left for short periods.

The problem now is that she seems to have taken a dislike to my eldest daughter (age 10)??  She barks around her, she also jumps up at her more than she does any one else, and although I play with the puppy and she seems to play 'nip' me, she actually seems to bite Charlotte in quite an agressive way and has even been known to draw blood!

What can I do to stop her being like this?  Is it a form of puppy jealousy in some ways?  I also have another daughter who's 7 and she's not aggressive at all with her.

Any suggestions welcome please??

How does she behave around your pup compared to her sister, this may give a clue. 

As well as looking into what Brainless has asked, puppies in general are drawn to children like a moth to light, they automatically know they are more likely to play, of smaller size and excitable just like themsleves, usually making a lethal cocktail if not supervised carefully. ;-)

I doubt that this puppy has taken a dislike to your 10 year old daughter it is probably the exact opposit.

Puppies are rough, noisy, they snarl, bite, sound threatening, drag, pull and play extremely aggressively at times, they really can hurt, their puppy teeth are literally like razors and their claws even when clipped very sharp, the puppy has probably found your daughter a suitable adversary to play more roughly with than your other daughter, pups do the same with their litter mates, some they ignore, some they play more gently with, and others they practically rough up and drag around, usually the more evenly matched, it is all play and learning to them!

There are ways to deal with this, firstly look up Jeangenies 'The Bite Stops Here' document, very useful, ;-)

Secondly, seperate your daughter/s and the pup if the play gets too rough, don't allow either child to over excite your pup, that will cause over boisterous behaviour,which is very hard to calm down, use toys, and tug ropes to detract her attention from your child.

Always be vigilant, children can get cross and smack or hurt a pup after a nip so protect both from each other.

If your pup gets too much you can crate or pop her in a seperate room until she calms down.

She will outgrow all of this, just remember she does not mean anything by it, to her she is playing the way she would with her littermates, you just need to teach her it is not acceptable with humans. Unfortunately it hurts us.  :-)