Look for small, tight, 3 distinguishable rows in the lav roos' combs. I had a few way back when that looked good and at about 4-5 months the combs lost all definition.
ETA- just found out that the Contrastphoto on the New Years Hatch has one lav cuckoo out so far
ETA- just found out that the Contrastphoto on the New Years Hatch has one lav cuckoo out so far
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