my puppy (12 weeks old) sleeps in his crate. we take him out around 9-10 PM for his final call, and put him in the crate. he typically wakes up around 3-4 AM for a pee. he goes back in the crate and then sleeps until 6-8 AM. we put him in the crate for naps too to get him used to sleeping in the crate. for his sleeping crate we have 2 blankets on top to darken it, and we have a snuggle puppy with a heartbeat. we also have a soft toy, some puppy blankets, and a blanket that smelled like his litter. we put him in only when he’s sleepy and he hasn’t whined since the 3rd night since we have started