This is a tough question. I'm around a lot of dogs so it's hard to pin point one. The Aussies are highly intelligent. The dogs I work with. If you tell them to "kennel in" no matter where they are or what they are doing they stop and run for their kennel doors.

The woman that ownes the Aussies also has a Swedish Vallhund named Chyna. This dog shocks me every time I see her. She acts like she understand ehat you are saying. She tells you in the most subtle way that she needs out. She knows when it's supper time and opens her crate and gets ready to eat. She doesn't get out of the crate until every last kibble is gone. She knows that too. So if she doesn't eat it all she just lays there. But the moment that bowl is empty, by gosh you better let her out.

Standard poodles seem to be pretty intelligent as well. When you go to a dog show you see poodles sleeping on their grooming tables. Sometimes for hours. Never being leashed. Some of the poodle owners even leave the room with the dog still on the table. The dogs never budge.