My puppy fell and didn't cry. Is she hurt? Is an arched back normal for poodles?

They will yelp and whine when something is painful enough. The fact that she didn't do this is a good sign that she did not hurt herself too bad.

I would not expect any broken bones or torn soft tissue from a fall at this height, but it's good to watch for any signs of a significant injury. Signs of a broken bone would be swelling and a great deal of pain. With a broken bone in the leg, they will limp and not put any weight on the limb. With a broken jaw, they often hold their mouth open and do not want to eat or drink. Less severe injuries will result in less severe immobility, but should be seen by a vet if the signs of injury last longer than 24 hours.

In order to comment on the curved joint, I would need to evaluate her in- person. However, this is a good question to ask your vet the next time she goes for an exam. Purebreeds are more likely to have skeletal abnormalities and it's possible that this is a fixable problem. It's also possible that this is normal for her breed.

For more information about general puppy care, I recommend you read the short article at the link below.

https://www.petcoach.co/article/puppy-101-everything-you-need-to-consider

I hope that helps and all is well with Coco.