Lolly walked this past Friday with her boyfriend on pavement and up and down steps for around 45 minutes. Its been so hot here this summer that she has not gotten much exercise. Only maybe 30 minutes of walking on the grass. She is 11 months old. Later that night she started limping on her right back leg when she first stands up. Once she is up and walking the leg does not bother her at all and she walks normally. Since I am leaving town for two weeks on Thursday, I took her to the Vet on Saturday morning. He couldn't pinpoint anything....put her Rimadyl .....