I added my 5th, a mixed breed to 4 yorkies, about 6 months ago. It's ok at times, but I've got one yorkied that has an attitude and will attack, Radar, the little mixed breed for no reason. I did try to find Radar a home when he first wandered into our yard, but fell in love with him (see avatar). For me, 5 is very hard. Hard to bathe, hard to walk, hard to load into the car to go for rides, hard in the RV, etc. Would I do it again, you bet'cha!