We just moved back down south after staying up north for a couple of years while my husband was working up there. Since we returned, our 5 year old lab will not do her business in our yard. She regularly holds everything longer than 24 hours. She eats and drinks and is taken out regularly but nothing. Up north we lived in an apartment in a rural area so she got to walk and sniff and do her business. Now we live on a super busy street and she needs to go in the yard. Anyone have any advice at all? A few months after adopting her 4 years ago, she had to have surgery for stones in her bladder. I don't want that to happen again. HELP!