Hi Becky A-
It seems like you are feeding about the right amount unless there are treats being added as well. Those can add up fast especially with a smaller dog. Has he had a blood test to check his thyroid levels? Some dogs are prone to hypothyroidism.
If it is a case where you are feeding treats in addition to his one cup of food per day, you might want to switch to a food with less calories. The Acana has over 400 calories per cup. I feed lower calorie food with low to moderate fat to keep my dogs weight under control because they didn’t want me feeding them less! Lol!
