Many years ago I designed a miniature microwave camera to fit Police dogs after the Hungerford Massacre.
From that, and after 5 years of trials on head harnesses I learnt an incredible amount about the dog and its muscle groups, as did many experts. The head fitted with a simple harness carrying a lightweight camera, stayed absolutely still when the dog ran at a target. It was like a giro stabilised platform, and produced fantastic footage in all conditions.
I tried it much later, on a gun dog as camera technology got greatly reduced, and was amazed to record and watch the habits of my dog.
Try it, worth watching as a brilliant training aid for gun dogs
Suggestion would be if you want to try this find a good HD camera that the freefall guys use and be amazed what your little fella gets up to with his nose!!