Whenever I leave the house for 3-8 hours, I put Koa in his crate. He has some treats, dogfood, toys, blanket and water in there. I read that this will make them feel safe and will "calm" them. He is now almost five months old. How long should I continue this for? Is it a good idea to crate them their whole lives when I leave the house? My parents never crated our lab and he seemed socially fine.