Hmmm… seems like we need a 23andMe solution for our pups. How bout we call it K9andme. I can remember most of my pups markings and have 100s of pics to refer to. That said they do change pretty fast. Our pup D’Otto was a split head with a nice dot right in white. It started as a dot and it’s still there! But it’s a bit more of an oval these days.
I forgot to mention that they can also be extreme houdinis. My female has learned how to manipulate the latch on her crate so I have to use a lock and she taught herself how to open the screen door. My friend had a male that could climb an 8 foot fence and escape. Be sure to check about such things when you talk with breeders or BRAT.
I think invis fencing is a bad idea for any dog. I've heard the Blaze story about an Aussie too. And in this day and age, with this economy, I've heard stories about people stealing dogs for ransom or worse things.