I have a yellow lab and she just turned 7 in March. In the last few days I've been noticing she can't jump or walk up stairs and has been sleeping a lot. However, she can run and walk without a limp and nothing seems to be causing her pain when I touch it. She was tested as a puppy and they figured out that she won't get hip displasia ( sorry about the spelling) does anyone know what could be wrong?! I want her to get better. Please please please comment! She's never had any problems.