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    Cockatiel has gone quiet after introducing a second one

    Hello everyone! I have two cockatiels, Cheeky (almost 5 y.o.) :yellow1: and Mango (almost a year old) :grey: Both are males. Cheeky was my first pet; I got him when he was 3 m.o., and back then I used to spend the entire day with him on my shoulder, so he got extremely attached to me. He learnt...