What happens when engineers have dogs.

I too fetch the ball back to often!
Gaining a joy and purpose
That far out-strips the meaning of the act
I load, wait for the stretching of the elastic and its release
and run back tail wagging
Again and again to reload.
An automoton by my own self circulating patters,
Not really a breathing living thing any-more
Is it me, or does this machine run too often for you too?