Glenbern Golden Retri​evers

puppy development structurally 

How puppy bones grow

Environmental Factors that affect growing puppies - Golden Retriever growth plates are usually closed by 18 months of age. 

Running up and downstairs
Jumping out of an SUV without guidance
Jumping on & off the sofa or bed
Jogging, running along side bicycles
Catching Frisbees or balls in the air
Climbing steep terrain
Spayed or Neutered to young
Rough housing with larger dogs
Slippery surfaces 

Three Rivers Kennel Club Feb 6, 2022   

This is something everyone should see. When you get your 8/10 week old puppies, please keep this image in mind. Their bones do not even touch yet. They plod around so cutely with big floppy paws and wobbly movement because their joints are entirely made up of muscle, tendons, ligaments with skin covering. Nothing is fitting tightly together or has a true socket yet. When you run them excessively or don't restrict their exercise to stop them from overdoing it during this period you don't give them a chance to grow properly. Every big jump or excited bouncing run causes impacts between the bones. In reasonable amounts this is not problematic and is the normal wear and tear that every animal will engage in. But when you're letting puppy jump up and down off the lounge or bed, take them for long walks/hikes, you are damaging that forming joint. When you let the puppy scramble on tile with no traction you are damaging the joint. You only get the chance to grow them once. A well built body is something that comes from excellent breeding and a great upbringing-BOTH, not just one. Once grown you will have the rest of their life to spend playing and engaging in higher impact exercise. So keep it calm while they're still little baby puppies and give the gift that can only be given once.     

Immunovet New Zealand Ltd. July 28, 2021   
By Patricia Crespo Photos @62 days *Many Bones are not fully fused until 13mo of age.