A young cow developed a severe fungal infection caused by Lichtheimia ramosa, a rare type of mold. The infection spread throughout the cow’s body, affecting the liver and digestive system. The cow had an underdeveloped immune system (thymus hypoplasia) and was given multiple antibiotics for weeks, which actually made the fungal infection worse by killing normal protective bacteria. Despite various treatments, the cow’s condition worsened and it had to be euthanized.