dog muck left behind by the "irresponsible" owner.Mum Katy MacDonald, 46, said her girls were left sobbing following the ordeal, which left them covered in the filth.The marine surveyor took to Facebook to share disgusting images of the children’s stained clothing in a plea to dog owners to clean up after their animals.A furious Katy wrote: “Thank you to the selfish, lazy irresponsible dog owner who decided they wouldn't clean up after their dog.“You ruined my children’s day out in the snow