Dogtooth is a gem I found on Netflix a few years ago. I've only seen it once, and it has since been removed from Netflix, but it deeply resonated with me. It can be found for free on Hulu (for mature audiences only, please)
Directed by Yorgos Lanthimos, Dogtooth is the very best kind of bad trip. A pair of hyper-protective parents keep three children locked down on a compound until their 'dogtooth' falls out. The parents are attempting to protect their young from the sins of the outside world, but end up creating a new kind of sinner.
This film is not for the squeamish, but I highly recommend it. It's definitely in my top 5. A tiny kitten does get killed, so if you don't want to watch that, maybe fast forward 5 minutes once you see the kitten?
Regardless, Dogtooth is a massively important statement on raising children in this world. For fans of The Virgin Suicides and Melancholia, you should definitely check it out.