Guide to ID a mojave?

[sho220]

One of the BPs we got at petsmart the other day looks a lot like a Mojave to my untrained eye. Any guides on determining whether or not its a mojave or a funny-looking normal?

Can't really bring a camera in to work and take pictures lol

Where's this Petsmart? I live in NoVa...I'll go check it out and let you know.