What do I do my dog eats a lot for its size?
First compare with other dogs of same breed, gender, age and health conditions to ascertain for sure that your dog is eating more food than what is normal. If there is any doubt or such comparison is not possible for some reason or other consult an expert vet or animal nutritionist.
If everything indicates that truly your dog eats more than normal then you must be careful about what it gets to eat. There may be many reasons for a dog eating more food than normal but most frequently it is because of the low quality of food served to the dog, as low quality food does not provide required nutrition to the dog, the dog eats more.
Give a balanced diet to your dog; do not solely depend on canned food. A judicious mix of canned food, dry food, fresh uncooked meat, milk (if your dog can digest milk) is best.
When buying food for your dog go for good brand (your vet may guide you in this matter) as food made of high quality ingredients will give your dog required nutrition.