Title--- Buddy and Pops

Question--- How does Buddy know Pops?

Answer--- Pops throws parties at his apartment because his owner is never home.

Evidence--- Leonard

Theory--- Leonard is a total party animal so he is a constant visitor at Pops' place. He also lives at the apartment building where a majority of the others live. One day, he probably told Buddy about the place and Pops. Whether Buddy went to see for himself or not is still a mystery. However, it does look like Pops and Buddy may know each other because the basset hound had actually said the dachshund's name. But Leonard is still the one who informs Buddy about Pops.

Unanswered Question--- Why did Buddy never mention Pops to any of the others until Max had gone missing?