He is 37kg, mostly sleepy at home but very protective over our other female dogs at outside so we walk him separately. While walking he walks slow, likes to sniff a lot, ignores other dogs and moves away from them but sometimes he can be reactive to the big male dogs or barking dogs. So we always walk calmly and try to be move away from other dogs, he prefers it too. And he is a ScoobyDoo actually he can suddenly afraid from strange noises and things, kind a funny way, not in a problematic way. I always use a front range harness so I can easily control him, so don't worry about his size. He is fine with the cats but some crazy cats attacked him for no reason so we are unsure about the cats in these days. So we need to be away from them too. He is totally fine with people but if a man with dog fear coming towards him he can sense it very good and can do fake barks to him. And we need to be careful about eating from the ground. He can be sneaky about this. ;)