Will daily exposure to sunlight kill external parasites on horses?

While sunlight can be detrimental to some external parasites like lice and mites, it alone might not completely kill and eradicate all infestations. Other parasites including bots, ticks, or internal parasites are not affected significantly by sunlight. For effective parasite control, consult with veterinarians on proper medication, hygiene protocols, and other targeted parasite eradication measures designed for horses.