I'm thinking about building a dog house for my mom. She has 4 dogs, two miniature pinchers, and 2 english bulldogs. I thought about making this thread on /diy/ but I don't really need any help with the building aspect of it, I'm already a pretty experienced builder.

My biggest concern is making something the dogs will actually use. I'm just looking for ideas. What do dogs like? Should it have windows? My mom keeps the dogs in her house almost all the time and the whole house smells pretty bad. She doesn't want to let them outside because shes afraid they will "get cold" even when it's like 65 outside. So I want to make something that will make the dogs want to spend more time outside than inside, and I'm going to make the whole thing look cozy to keep her happy.