I have been in the world of one dog at a time and right now two at a time. I do love the two at a time. Except for this one issue..I am so worried about. The one that is 5 months younger has lymphoma, so when his time is up, how will the other one act and be?? For 8.5 years they have slept together, kenneled together..everything together. So we are very worried about the one that survives. So I am not so sure I want to have two again. I just am not sure.