The scratch reflex can be useful for your veterinarian to determine if your pet is suffering from any nerve damage, kind of like when your doctor tests your knee reflexes during checkups. Also, since the reflex is more for swatting away pesky bugs, it doesn’t necessarily mean your dog likes being scratched in that particular area. But of course, some dogs do enjoy a good rub on the belly. You’ll just have to pick up on cues from your pet to figure that out.