One thing about parenting that can come as a surprise is the difference in opinion on how to raise kids between parents and grandparents. Most involved moms and dads can acknowledge that times have changed since they were children, and that there are probably things that they want to do differently from their parents. Whether this will be accepted by those older family members, though, is another matter altogether.
Rejecting the ways that your own kids want to parent can happen for many reasons. A lot of grandparents are stuck on what was considered the best thing to do back in their day, or they worry that the way their children want to go about things is going to have an adverse effect on their grandchildren. Sometimes, it is as simple as feeling like whatever parenting strategy their kids have adopted is an inconvenience that they do not want to deal with. If they are involved in the childcare of their grandkids, they think that they should get a say in how they are raised, right down to the smallest of habits. While some parents may find this helpful, others cannot help but feel that it would be better if they kept their opinions out of it.