NWT Hand Knit Crochet Stardew Valley plush chicken stuffie Handmade - video game Small parts (button on bottom for stabilization), not recommended for children under 3 years old. In Stardew Valley, a "blue chicken" is a special chicken color that you can purchase from Marnie after reaching 8 hearts of friendship with Shane; essentially, once you've seen Shane's 8-heart event, there's a 25% chance that any chicken you buy from Marnie will be blue, visually distinct from the standard brown or white chickens, but otherwise identical in function.