Did you know that sheep in the Zaporizhzhya region have a tiny, unwanted dance partner? It's a worm called Haemonchus contortus, and it loves to invade sheep's stomachs. Scientists from Lviv and Poltava studied this worm's behavior over five years. They found that a whopping 66. 36% of sheep were infected, with an average of 25. 56 worms per animal. This worm isn't fussy about seasons. It's there all year, but it gets cozy during fall and winter, with over 73% of sheep infected. During spring and summer, it takes a break, dropping to around 50%. The number of worms per sheep also changes with the seasons. Summer and fall see the most worms, while winter is the worm's least favorite time, with numbers dropping to as low as 10. 85 per sheep. This research helps farmers understand when to expect these tiny troublemakers and how to keep their sheep healthy.