Why Does Chip Have a Furrow in his Brow?

So this morning I woke up and as he always does, Chip woke up at the same time.

After showering and getting ready to go to work, I didn't see the dog, so I yelled out for him. He came running to me staring at me with a "I don't like you" look. I'm not sure what happened, but here's what he looked like:





Possible explanations:

1. New senior dog food causes massive indigestion.
2. He had a nightmare about his toys biting back at him.
3. He just realized that he has no control over his life - he relies on us to feed, bathe, walk, and love him.
4. He just realized that he has no bitches to do it with.
5. He didn't get much sleep the day before (because of guests in our house) and now he's grumpy.

I don't know. Hilarious nonetheless. Then before I left, he proceeded to give me his "Chip Furious" behavior. This is when he stares at you and growls and shakes like he's really mad. Not sure what's going on with our dog.