Apparently that can has 91kcal/can, and 10% of it is “crude protein.” Protein provides about 4 calories per gram, so one can is 2g protein.

If we scale to 250 kcal, that’s 6g protein.

Not sure I want to know where OP got their numbers from…

Also, regular chicken breast has higher protein content than this cat food, and it’s probably cheaper per calorie.