i think that to. i love them!!!

maybe labrudors or golden retreivers as my golden retiever that i acedtly sold was on level 2 on agilty trial as the dog got to expert and all the rest after it and went on to level 2

Labrador or Golden Retriever. Even Shetland Sheepdogs.

husky id say:)

I think its the German shepard too!

I think it all depends on the dog…
I've had really stupid Shelties--and I mean so stupid I had to sell it after it took 5 hours to learn its name--and really smart ones.
I've had really good luck with dalmatians, huskies, and shiba inus.