Dog daily Exercise

Question

Dollar male lab   Question : Shown below exercise is harm for his joints and bone?
         How much exercise for need to give for 3 month old          l          labbrador male in day(twice,thrice,once ?)
         and how much period?15 min,30,45,1hour(twice,thrice,once

i gave him 1 hour 30 min (walk,run,play in park) twice in day means total 3 hour so is it bad  ? or ok?   

Breed - Labrador retriver
name  - DOLLAR $$
Sex   - MALE
Age   - 3 months

also want to know feeding shedule of him(i provide royal canin labrador jonior 33)

Answer
For a 3 month old puppy, I would limit his exposure to other dogs in a dog park because he is not immune to the common diseases that older dogs can carry.  As far as exercise, 15 minutes 3 times a day should be sufficient.  Throwing something and having him retrieve it would be the most fun for a Lab. His bones and muscles are just developing, so he will not have the stamina of an older dog.  As far as feeding, he should be fed 3 times daily.  There is a feeding guide on the bag of dog food that you are feeding.  Go by that as a guide to how much he should eat.