Horses can be allergic or sensitive to lanolin, a waxy substance found in sheep's wool. Lanolin allergies in horses can manifest themselves as skin irritation, itching, a rash or hives if they come into contact with wool products or substances containing lanolin. If a horse cannot tolerate sheep's wool (=lambskin products), it is important to look out for wool products containing lanolin such as lambskin saddle pads or blankets. Instead, alternative materials that are hypoallergenic or less sensitive should be considered. Examples of this are synthetic materials such as alpaca wool, neoprene, polyester or fleece made from non-wool fibers. It should be noted that every horse can have different sensitivities and react differently. If you suspect your horse is allergic or sensitive to lanolin or sheep's wool, it is best to consult a veterinarian or equine dermatologist who can assess the situation and make a definite diagnosis