I've been doing some research on using pine or cedar shavings and from what I've learned, both are very harmful to pets. They are toxic... and can cause respiratory problems for all types of animals.ine is fine if it's dry, as in packaged kiln dried shavings. Have used it for over 6 years with no issues. It's aromatic cedar that can cause issues. ANY shavings that are super dusty can be a problem.
Definition of box sill. : a sill that is constructed of brick or concrete enclosed in planks and that is used in frame house construction.
1 Sill flashing or sill pan is a concealed flashing placed under windows or door thresholds to prevent water from entering a wall at those points.  Roof penetration flashing are used to waterproof pipes, supports, cables, and all roof protrusions.