your right there but some people don't have big pens or big back garden and only have the room for one dog but get what your saying.
Have bitch here for about 3 breed her when she was 5, she now 7 and pup,2.When pup gets to 5,l breed her and the old bitch be 10 and prop put to sleep around 11,12 if she still here but that is just me.And l hope to keep that cycle up