if your dog has a doggy door and access to a safe fenced yard, you could leave this with him all day with no worries once he figures out how to reload the unit. please know that the safety of our students will always be our top priority. cars which might be expensive are more at risk of being stolen. there are two ways to submit feedback about the product. as a reader, i sometimes tend to skip over the otherwise blank page containing only a quote by someone other than the book’s author. 