What Kind Of Dog Is It?

Several people have asked me this question today. Uhhh....I have no idea. I have no shame in admitting I am a dog idiot.

This is what I know:

~It has 4 legs.

~It has a tail.

~It has two ears.

~It barks.

~And it does this to my yard.

And here is a picture of the garbage man himself (or herself -- I didn't check).

Someone please tell me what kind it is so I can sound intelligent.