Answer:
What can you throw but not catch?
Slayer of regrets, old and new, sought by many, found by few.
Runs smoother than any rhyme, loves to fall but cannot climb.
Stealthy as a shadow in the dead of night, cunning but affectionate if given a bite. Never owned but often loved. At my sport considered cruel, but that's because you never know me at all.
Who spends the day at the window, goes to the table for meals. And hides at night?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?