brookcove
Posted : 6/1/2008 2:44:47 PM
When you mix an extreme physical trait with an average type dog, "averagneess" generally wins out. So you mix a dog with a bully-style head with a normal type, and you'll get a much more moderate head. Any random cross, even within a breed, will start reverting to "wild" type ASAP.
Leonbergers, for instance, are a giant breed, but their size has been carefully cultured over just a few generations compared to other mastiff breeds whose body type has remained stable for as much as a couple thousand years. Leos have the genetics of these dogs, but they also borrow from less stable gene pools like Newfoundland, and the proto-GSD. You can breed Maremmas with no thought to size for ten generations and end up with no greater abberration than my Min girl, who is only 75 pounds (my male, bred by me, weighs 150 pounds). But apparently you can't do the same with Leos.
I can totally see sheltie/pom. The minimal white, the expression, the way he's sitting - it's all very pom like. I'll put in another word for the toy breeds - Zhi was such an intense puppy that she lost three homes before she was ten weeks old. She's a firecracker! She's not a bit like my BCs though - her needs are totally different.