We had been sort of looking for another dog when Riley was diagnosed with bone cancer. After Riley went to the "bridge" we had another dog in less than two months. We merely continued looking for the right dog for our family. Found a delightful ~7 or 8 year old yellow lab...was perfect for us. (We had adopted Riley when he was 8 - so we definitely prefer the older dogs!!!)
Katy is a gem of a dog, and had come to the rescue as a result of being a stray. UMMM - you didn't miss your 90 # lap dog - who is a sweetheart? We've often wondered, but their loss was our gain.
I'll ooh and ahh over every puppy I see, cuz they are stinking cute. But I would never want to do all the puppy work, but then it needs to go home. I'll take an older dog any day for keeps.
We also felt that Riley gave us a "sign" that it was OK to get another dog. I know, sounds odd...but a tennis ball had somehow moved to the center of our family room, the day after it had been cleaned, the week after we had him put down. Of course - I also felt like Riley "picked us out" at the humane society too.
He was sure a "momma's boy", and I do miss him. Katy is a daddy's girl...and then likes DD next, I'm the 3rd choice...but that's OK. It is just different, that's all.
When you find the right dog - you'll know it is time to get a new one! Good luck with the search!!!