I dunno, on one level, this kind of makes sense. You shouldn’t drive with the dog in the front seat and/or with head hanging out of window. That said, I, for one do not want to be legally required to strap in Fido. My pooch stays on the floor under the dash.
A conservative would tell the government its none of their business about wether I should strap in my dog or not. How many have been killed by not having a seat belt on their dogs. With the millions of dogs in car’s everyday across this country, it better be a huge number or shut the heck up.