(Now you'd think that wouldn't be a problem in the UK, but you'd be wrong: During a heatwave (yes we get heatwaves), a police horse, called Sunny, got through 10 bottles of factor 50 sun cream a week, and that was just to protect his back, hips and nose. It's an expensive business, but a kind chemist donated five gallons of sun lotion to keep Sunny safe in the sun.
In fact any pets with white fur can get sunburnt. It is important to put sun cream on any parts that might catch the sun - the tips of the ears are especially important, as these can burn easily.)