I would be more likely to do it with males than females. The dogs are pretty much adults now, young adults. But I would keep your greetings with the dog that went with the other low key when they get back. If there was a shift in pack dynamics, sometimes it is resource guarding of significant humans that will spark conflict.
Heidi Ho, Odie
Joy-Joy, Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.