I think current stance held by most is that you should not run, bike, do agility with a dog until they are at least a year old and even longer for larger breeds. It supposedly damages fragile still growing bone structure.
On the other hand I think it is great to expose you puppy to things like running along side a bike while still young so that it won't be scary later (wish I would have done it with my older two!) I think it is really important to keep these rides nice and slow and short to prevent damage or injury. I wouldn't fo further than around a couple of blocks.
I started my puppy in agility earlier than a lot of people recommend because I wanted her to be comfortable with everything from an early age. I was very careful to keep jumps and contacts as low as possible and not ask her to run for prolonged periods of time. I wouldn't make a puppy run for any longer than the short bursts they would have during play.
On the other hand I think it is great to expose you puppy to things like running along side a bike while still young so that it won't be scary later (wish I would have done it with my older two!) I think it is really important to keep these rides nice and slow and short to prevent damage or injury. I wouldn't fo further than around a couple of blocks.
I started my puppy in agility earlier than a lot of people recommend because I wanted her to be comfortable with everything from an early age. I was very careful to keep jumps and contacts as low as possible and not ask her to run for prolonged periods of time. I wouldn't make a puppy run for any longer than the short bursts they would have during play.