hi, how long should i leave it before i take meg to the vets, shes still limping but now and again looks ok with her leg and just walks with it a little stiff, she was running about earlier with just a slight limp, she doesnt yelp or cry out in any pain when i look at her paws, feet or leg, could it be just a sprain, should i carry on taking her for walks or cut back on them? any one any ideas