The Cow and The Bull
Scholars have said that if one sees a cow or a bull scratching them, they might suffer an illness proportionate to the scratch, and if either animal leaps upon them, they might face hardship and punishment, possibly even death. A gathering of cows may indicate turmoil, and their entry into a city could symbolize successive years, with fat cows indicating prosperity and lean ones hardships. A pregnant cow might also signify a year anticipated to be fertile.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam