So recently I introduced my older parakeet to a new baby (A few months old). I did all the necessary quarantining and training before they were ever introduced. When they are together, the baby (Boogie) seems to desperately want to be friends. However, the older one (Elmer) mostly ignores Boogie.
The behavior cues I've seen are:
Elmer gently headbutts Boogie.
Elmer and Boogie open and close their beaks at each other, making no sounds.
Elmer doesn't let him near the food.
Elmer's favorite thing to do when out on the playground is to sit near the food dish, wherever it is. Boogie, wanting to be buddies, tries to sit with Elmer, but Elmer doesn't like that. I figure its a protecting his food thing, but Boogie has his own food dish. Boogie just wants to be near Elmer.
They don't really play. They just sit there. I really wanted them to be buddies, but I am not so sure now.
Elmer is a long story. I adopted Elmer from a shelter about five months ago. They said Elmer (at the time Eleanor) was female. Age was unknown. I knew it was an adult because it's eye had a ring. Later at a bird farm I was told Elmer was male. Okay. Made more sense since the cere was not rough like it should be on an adult female.
Boogie was bought from this same bird farm as a baby in September. We do not know it's gender yet officially, being so young. It still has all-black eyes. Guessing about 3 months old. I wonder if Boogie is male though, because Boogie recently started singing a lot.
They are kept in separate cages right now in separate rooms. They are only together for playtime.
As far as the food dish, I'm not sure. The playground has two food dishes with seed. But they only seem interested in the one that Elmer protects. they both have the same food and are at the same height.
As I said, Boogie seems to want to just be near Elmer. Whenever Elmer moves, Boogie follows. Elmer doesn't seem to care at all.