For a hunters' dog, Ovis might be a good choice.

OR

Ojo, it has a solid sound about it. Quick, sharp, and direct. Though it has many meanings, this one might suit a dog named Ojo:

Spanish masculine noun: Ojo

2: judgment, sharpness

tener buen ojo para

meaning to be a good judge of, to have a good eye for.

Excellent qualities in a dog for a variety of reasons.