Chino watches as her “grandpa” bread is overtaken in growing by Cocoa’s and Chiya’s breads. (“Grandpa” received being overtaken by Cocoa’s and Chiya’s breads.)

チノ：

「おじいちゃんがココアさんと千夜さんに抜(ぬ)かされました！」

抜(ぬ)かす‘s negative stem is 抜(ぬ)かさ. Append れる for 抜(ぬ)かされる.