How do you tell if your puppy has a serious case of Chondrodysplasia?

My aunt gave me her beagle because they didn't want her. She was given to them by a man who breeds them,she was the runt and he said she has Chondrodysplasia. It is also known as Chondrodystrophy from what I read from a website about it. I haven't taken her to the vet yet but she is about 5 months and I'm taking her early December for shots and such. But I still wanted to know if I could tell if she has a serious case of it. I read on the website if its too bad I would have to have her put to sleep. But,I don't think it is. Because she is a very playful happy puppy. She walks just fine as well as runs and rough houses with my duchunds. But,she does have a bad over bite and her front legs are a little apart but that is the only thing that she has that beagles with Chondrodysplasia are seen with and none of that slows her down. She eats fine,healthy stool and her teeth are pretty healthy. Her spine,from what I can see isn't crooked either. I was wondering if anyone has experience with it though and could give me some advice. Oh,Also. Her legs are very long already. And dwarfism is suppose to make them small,I thought? I can send pictures to anyone who is interested. Thanks! :D Link to the website I read about Chondrodysplasia: a href="http://clubs.akc.org/NBC/dwarf.html" rel="nofollow"http://clubs.akc.org/NBC/dwarf.html/a