I am looking at our little pup, Hazel. He is 4.5 months going on 5 months next week and weights about 20lbs. I do not have the measurements for his mom and dad but mom is definitely a bigger corgi and dad is medium sized. I've included some photos below for reference. The reason for my post is I am concerned with his growth rate. Is he growing too quickly for the breed? If he is, what stress is being put on his little joints that could lead to spine and joint problems including hip dysplasia…