So, I have noticed this over the last two and bit years with my dog Luke and wondered if anyone else has this with their dog.
It seems that in Winter Luke requires 2-3 hours walk a day, whereas in Summer he needs 1 hour-ish to keep him settled. He went for a 2 hour walk with the other dogs today and they were all still full of energy tonight. We fixed them by putting the heater on they passed straight out.
Does anyone else have a dog or dogs like this or am I just the "lucky" one?