Answer:
Blade to blade I always win My foe laid low and even. Yard by yard through thick and thin I'm busiest in season.
Canine children.
I have memories but none of my own whatever's on my inside is what is shown. If I'm ever different it's because you changed me I feel like a decoration here for you to arrange me.
I am what brings things together. Without me everything you see would be a total mass or debris everywhere. What am I?
The faster you run, the harder it is to catch me. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?