Hi! I don't personally know anything about rickets, but I did find this on the Internet:
http://www.seefido.com/canine-dog-he..._or_canine.htm http://lowchensaustralia.com/health/anatomy.htm
I just added a labrador puppy to our furfamily. He's such a joy.
There is a board called
www.lab-retriever.net that is just like YT except for lab owners. I bet you could post this question there and get lots of responses. Best of luck!