Yes, normally cows have four nipples (also known as teats).
While the typical number is four, variations can occur. Bateson (1) notes that some cows may have six teats, with four being of normal size and two smaller ones located behind them. However, the functional and commonly observed number of teats in cows is four. These four teats are connected to separate mammary glands within the udder, allowing the cow to produce milk efficiently. The presence of extra teats (supernumerary teats) is a variation, not the norm.
Therefore, the statement that cows have four nipples is generally accurate and reflects the standard anatomy of dairy cattle.