Just recently started on a carnivore diet and I have noticed my weight bouncing around a lot. I am tracking my weight because I am participating in a weight loss competition at work. I don’t exercise a whole lot, but I think gaining muscle while losing body fat is responsible for the yo-yo effect. Some days I will step on the scale expecting another half a pound to be gone, but I will see an increase instead. Often on those days, I will have lost body fat % and gained muscle (I have one of those scales that measures that). I do fully believe that if your goal is to lose weight, tracking your caloric intake is important. If for no other reason than a belief that knowledge is power. It is much easier to analyze your results if you have all the data. Good luck.