Answer:
I start in little but I end in full, you'll find me in half and complete.
A father's child, a mother's child, yet no one's son
What is all over a house?
I'm a small ring shaped fried cake, often with bavarian cream or fruit filling, and sometimes covered in icing and sprinkles.
Longer than a decade and shorter than a milennium
People take me on walks and I run and have fun. What am I?