I regularly go running with my dog around the park. He's a chocolate lab, 42 kg (all muscle) and we regularly do ~4 km in about 25-30 mins (he always stops to sniff). (For reference, I'm 81 kg.)
I run with a GPS watch that gives me my calories burnt, but wondered if it's possible to calculate how much my dog burned in the equivalent period? I don't know if it would be a simple reduction i.e. he's body weight as a percentage of mine, or if it's different because of four-legs etc.
I know this isn't the exactly a standard fitness question, but if anyone knows I'd be really grateful. Searches so far have only turned up calculators for the dog walker and not the dog.