We have a 13 week old Neopolitan Mastiff pup and after sending a picture to the breeder recently they suggested upping her calcium intake based on the way she is sitting. Didn't elaborate much more but this was a new one to me. She was definitely a runt in the litter and has been growing pretty fast since coming home with us. Basically the comment was that she should be sitting forward more. up on her front paws and less slumping back on her haunches. Attaching some pictures so you all can take a look. I have never heard this before and I can't seem to find anything searching for info on it. Thoughts?