No, they do not. Which is why one needs two or more and spread out the ages. Keep refilling the ranks as time goes by. Your assessment of the breed is spot on.We have raised and bred Australian Shepherds for over 25 years …. Always thought they were an best breed! Still have 3. Great dogs!
But……….
Our first BMD and I have to say I'm blown away! What an amazing breed! This guy is so smart and Loves more than any dog I've ever been around. Always so Happy. He will walk through fire to try and please you!
The only down size is they don't live as long as most breeds!