Logan is VERY lean, you can see all his individual ribs and his hip bones. He's on raw meat, 3% of his body weight which is 19kg. He has in total 4 hours during the day running around with Duke in our garden or playing with the frisbee. He has an hour walk in the evening. I don't want to cut down his exercise that much because I don't want him to get unhealthy. I don't know what else to do apart from maybe giving him an extra meal in the day, or not letting him outside playing as much. The vet wasn't much help.