Hi I think this is normal puppy behaviour. Our Cocker Spaniel is now 6 months and we got her at 9 1/2 weeks and although she has been very good from the begining she sometimes would try to see how far she could go. Any unwanted behaviour we used the pet corrector (bought from Pets at home). Its a pressurised canister that releases a short burst of air when pressed. It works wonders and usually stops the unwanted behaiviour straight away.

If Mia is playing with us and sometimes bites (playfully) we usually let out a loud and high pitch "ouch" and that also does the trick.

Are you letting her out in the garden?

Mia had her 2nd injection 1 or 2 weeks after we got her and then took her for her first walk 7 days later but we always gave her enough exersise in the garden and mental activity.

As long as she isnt in contact with any other dogs before she has her jabs playing in the garden is ok. Maybe she just needs that mental stimulation to keep her mind active?

Let us know how you guys get on..........and welcome to the forum (post some pics)

Chezza