Because the animal gets killed in the end, and the way in which it is killed is cruel, but its a tradition in spain

The older I get, the better I used to be. Seen it all, done it all, can't remember most of it! Once you're over the hill, you pick up speed! We'd rather be over the hill than under it. Old age is not so bad when you consider the alternatives.

Kelpie's are highly energetic and smart, schnauzer would be a good option  the hungarian vizler is known for beauty agility and also adores the attention of humans if you can afford one that would be the best option