English Bulldog Excessive Drooling. Excessive drooling in dogs is called hypersalivation. Some conditions are pretty easy to solve but then you have others which might take some time.

Heavy panting or breathing is characterized by drooling that your English bulldog cannot stop. She is eating and drinking normally. If the amount of drool suddenly changes is accompanied by an unusual foul smell or your dog starts to drool excessively at unusual times such as while resting have him examined by your veterinarian.
Bulldogs tend to drool more due to their lower jowl trait sagging skin below the chin lower hanging lips and overall head structure.
Youll have to do a little mopping up afterward thats all. It means your dog is having some severe allergic reaction. Moreover you may even hear a wheezing sound while your bulldog is doing this. It is difficult for saliva to not build up and have the drool cascade out of the bulldogs month.