Star and Brat's Mom - what on earth is a Pixie Bob?!!

Here's another element to think about: Does it make a difference if the parents are purebreds or unknown? If you know what both parents are, what do you call the offspring - Cross? If you don't know what the parents are, is this a mix?

And... if you know that one parent is a purebred of some type, but either don't know the other parent or don't know what breeds are in the other parent, what would you describe the offspring as?

Is it easier to describe a pet based on their overall look (or phenotype for those scientifically minded), or based on their genetic history (genotype)? Which would you think was more important?

Lastly, some more terms that are commonly used - what are your definitions for these?:

Moggy
Mutt
Mongrel
Bitzer