Who's knocking?

Who could it be? I think it might be Gracie girl.. She is checking in to see when the food is going to be ready. The dogs love the doggie door to see whats going on. Bud will poke his head out to see what the weather is like before he goes outside. Gracie will go out no matter what weather, but she likes to poke her head in occasionally to check on Bud and I. It is sometimes hard to get her to come inside! She will freeze out there in the morning, but won't give up her job of guard dog. On the other hand, Mr. Bud doesn't even want to go outside and pee if the grass is the slightest bit wet.