Let’s clear something up. Lassie was a Collie, not a Shetland Sheepdog. And yes, the two are different. Sure, they’re both fluffy and have wedge-shaped heads. But the Shetland Sheepdog, or Sheltie, is about half the size of his Collie cousin.
Smaller doesn’t mean dumber, though.
In fact, the smaller Sheltie is the smarter of the two dogs, ranking as the 6th most intelligent breed. (Whereas the Collie comes in 16th place.)
So the Sheltie actually one-ups Lassie by quite a bit!
Don’t offend Sheltie owners by making phony Lassie jokes. Their pups are smarter than that!