Join Date: Mar 2010
Location: Ontario, Canada
First, I'd ensure that the UTI has cleared up. If so, then she might still be associating her pain with the box in the original spot. Thus, I'd move the box back to the temporary spot (which I think is your spare bedroom) for a good length of time (at least a month). Assuming you have no further issues, I'd then add a second box in your desired location and, once she shows a willingness to use the box in the desired location, remove the box in the spare bedroom.
Dogs have owners. Cats have staff.