How are Jack Russells ranked in intelligence?

Answer 1

New answer. The Jack Russell's full bred name is the Jack Russell Terrier. In his book The Intelligence of Dogs, probably the best book on the subject, Stanley Coren describes intelligence tests he uses to find a dog's intelligence and he rates many breeds. His list of 79 breeds shows no terriers until #27 and most of the terriers start to show up on the list between #47 and #79. This means that generally speaking most terrier breeds are in the lower half of the list in intelligence.

Jack Russell Terriers, which are noted for their intelligence, were not ranked because they were not recognized by the AKC until 2013. Coren did not include breeds recognized elsewhere but not in North America.