Despite knowing that our parents and in-laws have years of experience looking after their own families, so much has changed over the last few decades that it's not surprising some parents feel as if they need to include instructions when leaving babies with grandparents. From back-to-sleep to crib bumpers to feeding practices, there is a long list of topics that parents need to go over with caregivers, including well-meaning grandparents. But dealing with relatives is different from hiring a sitter, because parents want to avoid offending grandparents or making them feel judged. This is particularly true when it comes to health and safety, where research has shown that the way things were done 40 years ago differs from what we now know is best.