I’m carried but not heavy, I’m nailed yet feel no pain. Remove a D and I am an animal

four to start, a pretend bout, in the ring, where you are just practicing. punches light, though still delight, this session is just to train. last three go together, in a streak, as an example, for a winning sports team, as they win more than one back-to-back. add them together, a small little songbird, who’s been with humanity since the Stone Age.

I'm from the old times when we all used to be one Today we're many and keep distancing from each other What I become endure the invisible lines all over me

I prick the hand that grasps too fast, my name grows shorter when I’m cast from one to many; count me twice, I lose a letter, not my spikes. What am I?

I am five in binary and a laugh in slang. I am how many dogs there were in a well known movie with dogs