I for one think it is twice the work, Although it is a labor of love. I have fosters frequently and I must say when I have only my girl in the house it is much quieter and calmer. I dont trip over animals and there are never any disruptions, meal time is easier and I dont worry about any squabbles when I'm not looking. Of course, watching the dogs play and the how sweet they are when they sack out together on the floor is always a pleasure and makes up for any inconvenience. If we had more room, I think it would be different for me and perhaps easier to accommodate another dog more comfortably, for now, I will stick to just one forever dog, and help fosters as I can.