Thailand's Egg Farmer Cooperative Network has increased the price of eggs from 3.6 baht to 3.8 baht per egg due to rising animal feed prices and the retirement of old hens. The price of larger eggs has risen to 4-4.2 baht per egg or 100-110 baht per tray, with some sizes no longer available. Duck egg prices have also increased due to low output, with a tray of No. 1 duck eggs costing around 140 baht. The price hike comes as demand is predicted to rise when the school semester starts, leading to bulk purchases and concerns about further price increases.