I happened to look towards the river this afternoon and noticed the Swans wandering up the lawn towards the bungalow.   Although Luna is quite accustomed to them being on the water I did manage to put her indoors before she spotted them and grab my camera at the same time.    I don't think she would chase them but better to be safe than sorry.
As  much as I love to see them I'm a tad uncomfortable that they have taken to wandering around the garden, especially if I don't notice them and Luna is outside on her own.