Answer:
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
I am an object which is used in baseball during the day I can't be seen at all
I can be found in water but never wet
I am the same written forward backward and upside down.
What's 3/7 chicken, 2/3 cat, and 2/4 goat?
No matter how little or how much you use me, you change me every month.