Hey Leslie, it looks like he is getting 225 calories a day if you are giving him 1.3 oz five times a day. The calorie count on the cat food cans are the Kal. If he weighs 12 lbs so, 232 calories a day is what I am coming up. Is 12 lbs a good weight for him? Or should he be more?
I use this formula:
The cat's ideal weight X 13 + 70
I used 12 lbs. X 13= 156 + 70 + 226.
Gill ask about the last blood work which is a good point. Maybe a vet visit soon to find out why he is losing weight . He is the right age for cats to get hyperthyroidism so I would want to rule that out. My civvie cat started losing and wanting to eat all the time and sure enough, he was hyperthyroidism.