Answer:
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.
What is so fragile that saying its name breaks it?
It holds no blessings in disguise. Its rhymes are aimed at your demise, it's cast only to ruin, Whatever you are doin'.
A red drum which sounds without being touched, and grows silent, when it is touched.
Don't do this in the shallow end.
People take me on walks and I run and have fun. What am I?