We have some "love" triangles in my house.
One Amazon parrot (Gladys) loves me. The second Amazon parrot (Major) loves Gladys, hates me. Gladys hates Major, and will not allow him within 24 inches of her. This is measured rather exactly. After each rebuff, Major attacks me. Gladys hates my husband. Major might be friendly to husband, but husband only tolerates birds and does not want any bird friends. The third Amazon parrot (Nana) is not fond of any of us.
Every day I let Gladys and Major stroll around the house for exercise (Nana prefers to stay near his/her cage). Just like a couple of human children, if these two are out and not fighting, they are probably doing something they shouldn't. A couple of days ago they were out and very quiet. Too quiet. I should have investigated faster. Major stood guard while Gladys destroyed a pair of long-suffering husband's shoes. Well the shoes are still usable, but husband refuses to wear shoes with pinked edges so carefully created by a bad bird's beak.
Bad bird! Bad, bad bird!