Answer:
I am a sharp looking horse with a flaxen tail. The longer I run the shorter my tail becomes.
What gets sharper the more you use it?
Canine children.
They come out at night without being called. They are lost in the day without being stolen. What are they?
I am a mountain at night meadow at day
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?