This cat condo was ideal for our outside cats for shelter, so we thought.  We have a family of 5 and another wood cat house and wanted additional shelter with colder weather coming.  Finally, in the past few days, the mama and pappa cat  take turns getting in the cat condo.  The 3 kittens, won't get in it and we have tried everyting from additional padding/bedding to cat nip and treats.  Hopefully, we will continue to make progress since we purchased the cat condo in October of 2017.