How interesting to find I'm not alone in having eaten dog biscuits as a child. I only did this at my grandparents house, where a bowl of dog biscuits for their resident dog was always on the kitchen floor. I loved the dog and we'd sit together whilst I nibbled on one of his biscuits.
This could never happen at my house now I'm a grannie. My resident dogs wolf down anything that's put on the floor, whether its intended for them or not.
I've never eaten raw pasta and neither have my children/grandchildren but I can't imagine it'd do any harm - they surely couldn't manage to get huge quantities down.