Answer:
When I come in from sea to shore twenty paces you'll see No less no more.
I am an activity dogs are very good at when a ball is thrown.
Use me to reward good behavior.
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I’ve told you all I cannot tell you more.
You throw away my outside, you cook my inside. Then you eat my outside and you throw away my inside. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.