Why does a mare's urine look milky?

A mare's urine can appear milky due to the presence of calcium carbonate crystals or other sediment, which is common in equine urine. This milky appearance is often more pronounced when the mare is in heat or pregnant, as hormonal changes can affect urine composition. Additionally, hydration levels and diet can influence the clarity of the urine. If the milky appearance is persistent or accompanied by other symptoms, it may be advisable to consult a veterinarian.