Dog- gone it!

Sadly, our little hobby farm is a magnet for those who decide they don't want their pets anymore. Stray dogs and boxes of kittens can be found out in the yard up to a dozen times a year. Here's our latest visitor:

I opened the front door on my way to pick up my son at school and that's what was looking at me. Cute, huh.
Usually we try to find homes for these poor four legged friends. But, every once in a while one steals our hearts and ends up taking residence. I'm not sure if we'll keep this pup. He's going to be huge. But, how can I resist that face?

Either way he's going to need a name. Any suggestions?