Accepted Answer

All the foods have different calorie amounts per cup though many are similar. That is the first thing to look at to determine what your dog may need for food.
Then you need to look at the pup's current weight. The mid size dog breeds usually require about 30 calories per pound of body weight per day. The larger and giant breeds need only 20 calories per pound of weight, but the smaller breeds may need up to 40 calories per pound of body weight.
Now the French Bulldog is on the small size as dogs go but it is of 'mastiff' background and may actually need fewer calories per pound to maintain weight. Pups do need extra to use for growth. I think you can see this isn't an exact science!
But I'd figure out a diet giving him over a days time the number of calories for 30 calories per pound split across the two meals. So if he is 20 pounds then he'd need 600 calories to maintain his weight and split across two meals it would be about 300 calories per meal. If your food has 310-320 calories per cup then it would be about a cup a meal to maintain weight. You might add as much as 1/4 more to allow for growth.
If he gets pudgy cut him back, if he starts looking a little lean add some more.
There is always variance due to exercise levels, temperature, and the age of the dog.
For my little dogs I found a baby scale at a yard sale - one of the nice flat easy to store ones and I keep track of their weight that way.
You want him muscular not fat as that is best for his health.
Hope this helps you!

Expert:	NancyH
Pos. Feedback:	99.5 %
Accepts:	19879
Answered:	11/16/2007

Dog Expert:Rescue, Train,Breed,Care

30+ yrs dog home vet care & nursing, rescue, behavior&training, responsible show breeding, genetics