
i had the same problem after i wormed my recent litter with drontal 6 & 8 weeks they had very loose stools worse at 8 weeks, both times i gave them prokolin 1st time given to me by the vets then i just bought it online the 2nd time much cheaper :)
http://www.vetuk.co.uk/index.php?main_page=product_info&cPath=5_145&products_id=249 it worked a treat too, as for mum still cleaning up after pups go on solids, my girl is still cleaning up after her daughter nearly 12 weeks on and did the same until the other 3 left too lol !