The dog equivalent of a Ferrari

The title of this post is a quote from my dad, from just now when I demanded he give me stories about his dog, Herbert (Herbie), who I never knew. And it happened like this:

Herbie was a lurcher, a cross of two breeds, the names of which have already slipped out of my head. Anyway, he was a pacifist. He loved chasing things. Loved it. But when he caught something... he'd let it go. Except on one occasion.

One of the local cats was used to the old dog, who was slow and not up to much cat-chasing. It was surprised, then, when as it walked up the path it met with "the dog equivalent of a Ferrari", who had other ideas. There was an almighty noise, and Dad duly went to see what was going on...

...Only to find the cat, nine feet up from the ground, spread-eagled, holding onto the fence for dear life. And, suspended below it, Herbie, teeth in its tail.