I agree. I'd have her hips and elbows checked to be better safe than sorry. With an increasingly aging dog, however, I know there are gradual symptoms to dip dysplasia/arthritis.

How do you usually exercise Daisy and for how long? If you've noticed her slowing down or sitting more often of her usual walks, she could be having some hip/elbow problems. Arthritic/dysplastic dogs also display a noticeable decrease in jumping onto familiar objects like the furniture and car. They will also try to avoid stairs or go on them either more slowly or timidly. You'll see that many arthritic dogs go on the stairs with two feet on each step before proceeding to the next level. They can also show discomfort by preferring to lie down or sit down on their "thighs" rather than a pretty, tight sit. You'll especially notice this when you command a Sit and Daisy hesitates or sits on her thighs. If Daisy shows any of these symptoms, I'd call the vet to have her hips and elbows checked out. So sorry to hear about Daisy's bad day, and I hope that that's all it is!