Mad dog

Poochie, my in-laws dog, came to spend the day in the office today, and when I took her for a walk earlier, she jumped into a low bush and starting writhing around like a complete loon! As much as I do love Poochie, I do also feel constantly worried when I'm looking after her - is she ok? Is she hungry? Does she need to go out? Does she want to come in? I've never had a dog before, and am just not used to animals that don't boss me about and yowl loudly until they get exactly what they want!