Phoebe is 20 weeks now, we managed to get here outside to do toilet and she is fine with that but we still put down a puppy mat at nights just incase, but most times she is fine. She will sit when you have a treat for her! No treat no sit lol. Phoebe was the smallest compared to her 2 sisters, but like you say full of energy and guaranteed she will have a mad half hour running around the house every night, we just leave her to it as she will not listen in that time. She is very friendly put a pain as she always brings mud, leave and most other things in from out the garden.