There is a myth that Labradoodles are easy to maintain, don't shed, and are non-droolers. This should be cleared up. If you want a properly behaved 'Doodle, there will be maintenance work — although it can be made enjoyable. As for shedding, the amount shed depends first on the coat type and afterward, on the diet, exercise, and environment. The same goes for drooling. While Poodles aren't known to drool, Labradors are, and this means your Labradoodle may or may not drool a bit naturally.
There are many things that can induce excessive drooling in 'Doodles, however. It might be unavoidable, such as when he is teething. It might be environmental, such as his first car ride or a new home. It might be a health issue, such as something stuck in his gums. He may have eaten a noxious plant. It might also just be a general untidiness, such as when he sloppily drinks water and slobbers a lot doing so. For this, you can get a deeper water bowl, fill it just halfway and put a mat beneath the bowl.
Labradoodle shedding can be an issue that may be problematic depending on the coat type and how much grooming you give it. First-generation (i.e., F1) Labradoodles tend to shed the most of these hybrid dogs. The F1bs, which are bred back to Poodles, are a bit better. The F2 and multigen (F3, etc.) litters typically inherit the Poodle parent's curly, nearly non-shedding coat. It's widely believed that the more curl in the coat, the less shedding. If there is excessive or uneven shedding, there could be a health problem or skin condition. Finally, be sure that, if it's excessive shedding, it's not just the puppy coat that's being replaced by the adult one.