So- I've seen a few different products online advertised to keep dogs from chewing on furniture. Most are 'all natural no-chew sprays' that you spray directly on furniture that you don't want your dog to chew. They advertise that they're made of bitter apple or lemon or some other flavor dogs hate. My question is- do they work? We foster puppies for a local rescue for 2 to 5 nights during 'emergency placements' and often the pups want to chew EVERYTHING (except for their toys :eyeroll: ). I'd love to find a way to keep them from chewing on my book shelf and couch legs when they are in the livingroom- so I was very curious if anyone uses these sprays. If so- what brand? How well does it work? How long does it last once you've sprayed it? And does it harm the furniture at all?