Any dog I've ever had gave some kind of signal when they needed to go out. I had one that would come up to me, and then run to the door. Another sat down and stared at me. Maggie, my shep/collie mix, pants at me. I've had Daisy since July, and she has never done any of those things.
Tonight by chance, I discovered what her "signal" is. She sits on the end of the runner near the back door. This would be fine except typically I am nowhere nearby! :eyes: I am going to try and teach her how to ring a bell. (It really was cute though....her itty bitty self just sitting there waiting for me to magically know she was back there.)