LPs are very common with small dogs.   Since she's not showing any painful signs i wouldn't worry too too much but try to keep jumping to a minimum.  Don't let her jump off the couch or bed because that could aggrevate it.  Also, if your on missing link, try getting the missing link plus for the glucosamine.  it will help.   Jodie gives it to Sissy i believe because she has small grade LPs     
				__________________  Kellie    and    Morgan      |