After looking back through my threads, I said in January, that he was 13kg and again in Feb, I said he was 13kg. So I must have got the weights wrong in my head. So it looks like he's only dropped 2kg over the last month. He weighed 13kg a month ago, and now weighs 11kg. Is this still a worry? Looks like he was never at 15kg, I just plucked it out of thin air.
(silly head!!!) Over this time, he's increased his exercise from 15 mins off lead & 40-50 mins on lead to 30 mins off lead, 1hr off lead in country park once a week, 1hr 5min on lead, and starting agility. Would the exercise have purely caused this? He is a picture of health, active, poos are fine, etc.