Kepler's Task. 1  A portrait of Johannes Kepler by an unknown artist. 2  Kepler's Third Law: The Hohmann Transfer Orbit. 3  Circular and Elliptical Orbits Having the Same Period and Focus. 4  Circular and Elliptical Orbits Having the Same Period and Focus. 5  Illustrating Kepler's 2nd law: Segments AB and CD take equal times to cover.
Generally, it takes between seven and 10 hours for a dog to digest food, but the many variables mean that only your vet can tell you how long it should be taking.
Actually, one of our dogs was a crayon-eater in her younger years, which allowed us to track her digestion times quite nicely, if a bit colorfully. Typically she seemed to excrete the previously consumed crayons in about 12 hours, along with whatever else she had eaten around that time.