My 1 1/2 year old sheltie used to run around the yard where ever now when she walks a short distance sniffing the ground and then will stop and turn around. She does this many times. She will run across the lawn anywhere if she sees someone outside our fence, but will seem to pick her way back. I can call her to a spot on the lawn but as soon as she reaches me she turns around and trots back to the patio. This is all to find a spot to relieve herself. Is the yard becoming too saturated with urine. We pick up her poop everyday. When I take her for a walk in the park she goes anywhere. What's the answer?