We had a bulldog when i was young, and one of my best memories are how awkwardly she was sitting all the time. Frenchie owners will know :D :D
3 botom layer,
5 top layer,
only needs a little bit of support at the stomach, but it will probably print just fine without it.
rigged in 3dsMax to modify the positure, than cleaned off and added details in Meshmixer