Puzzled Pug

This is Bailey again...

There are a few key words that make her tilt her head back and forth like this...They are...
Treat
Go for a ride?
Mom's home
Dad's home
Grampa's here
Gramma's here
Wanna go see Lucy? (My Dad and Mom's dog)
Wanna go see Maggie? (My Dad and Mom's dog)
Wanna go see Dicken's?(My mother-in-laws dog)
Wanna go see Pete, Shorty?(My brothers dogs)
Who's here?

I think that covers it.