Frustrated with Spouse

I have been trying to convince my spouse to join me on carnivore for awhile, I asked him to just try a month and see how it goes ( he has a lot of health issues that would probably go away with carnivore) and he said sure why not. I even went to the extra effort to prepare meat snacks for his late night work to make it easier when he wanted to snack on something. Literally 1 day later he is snacking on chocolates and sweets. Does anyone else have spouse or significant other that isn’t interested? Any advice to help?