I don't eat any snacks, I'll have a full meal if I am hungry. And will eat nothing if I'm not, for example when I'm seeing my daughter to school I'll just have a cup of tea for breakfast. But the transition has different rules, so feel free to snack whenever you want to.
- Bulletproof coffee (with butter) or tea with coconut oil if you crave just a bit of food.
- Some eggs (which I prefer scrambled in butter).
- Some people like cocoa butter, which can be added to tea/coffee instead of butter, and I even heard of people who just suck on it as a snack. Not everybody likes the taste, but many people say that they find cocoa butter very satiating, more than butter or coconut oil.
- I will also sometimes cook meatballs where I'll add various spices to get some variety, that can be kept in the fridge for a few days. They can be eaten cold or microwaved.
- Oh, and don't forget chaffles. Mix a small cup of grated cheese (mozarella or the like) with salt and an egg, add spices if you want, and throw it in a waffle iron. You can add bacon or something before baking, or let it cool of and use it as bread substitute with butter, cream cheese and whatever toppings you prefer.
- Homemade bone broth is a classic. Some people put it in a blender and mix it to a creamy consistency. Commercial bone broth often is low fat.
No good answer to the bacon. Most people think that bacon is fine, however some people (me included) are worried about preservatives, sodium nitride mainly. Personally I will eat bacon or other meat with preservatives on occasion, but no more than once or twice a week. I prefer fresh sausages with no preservatives except salt, citric acid and the like, that will keep only a few days. Anything that has a "best before" that is further than a week away will contain preservatives.
Having said that, the biggest step is to transition to keto/carnivore. What I said in the previous paragraph is advanced finetuning. I'd say eat as much and as often as you like (read: whenever you're hungry) while you in transition, including bacon and sausages. Just make sure you eat enough fat. We can do the finetuning 3 months down the road when you're fully fat adapted.
Footnote: Cocoa butter is not carnivore. However, all the major fats contained in it are also part of animal fats, and I'm not aware of any antinutrients (like oxalates). Check out
the fat composition on Wikipedia if you want to compare.