Not a whole heck of a lot, actually.
We did have a fun few days with Millie when little Diesel from down the street was out running around the neighborhood. He gets out of his yard on occasion and spends the day wandering. We took Millie outside in the front yard, being a little nervous that she might not like another dog in her yard but since Diesel is a little smaller than her she didn't see him as much of a threat. He wanted to play with her and at first she wasn't sure how to do that but caught on quickly. They ran around the front yard chasing each other and play biting, then they would get tired and go back to either sniffing around or laying in the shade.
We had a few days in a row where Millie had a little playmate but haven't seen Diesel in a while so his people must have fixed it so he can't dig out of the yard. I kind of miss him and so does Millie!
We ordered an outdoor dog house thing with a waterproof fabric shell and a mesh floor, thinking Millie would use it out in the yard. However, Buddie found it first so it will be his outside hideaway. I thought it was cute that on the front of the box they show an orange cat in the house and that's exactly what we have in it here at home.