When having a pet as a puppy, it is always excellent to plan in front just like when having a baby in the house. Just like little package of joy, they can surprise you and grow out of the little baskets you have prepared for your French bulldog puppy. With the accurate diet, exercise, grooming and care the French bulldog will do most of his rising during the first year.At this time, you can expect him to possibly need a slightly better sleeping space and all. Once the first year passes, the growth will slow down but their bodies will carry on to mature and have definitions and divisions of an adult French Bulldog. By age 3, they are formally done rising up. A fully developed French Bulldog would be real 12 inches in height and weigh between 19 to 28 pounds.