Usable rows first
Black 8.8 kg, Zombie 20 kg, Pig 38 kg, and White 17 kg have appeared in dated field evidence. Black and Zombie currently have the strongest zone/egg context; White and Pig are kept as open capture rows instead of being inflated into complete stats.
Weights are examples, not fixed stats
A sale receipt shows Black Eggs at both 11 kg and 5.6 kg, so visible weight is instance-level data. The next useful capture pass should add rarity, exact spawn zone, egg mapping, and sell value for each chicken.