Two sun dogs and the hint of a halo followed the morning sun across the sky on Wednesday, Dec. 11. Lois Leis, of Cameron, took the photo after stopping on a side road off of CTH SS, just south of Cameron. Sun dogs form when hexagonal ice crystals, suspended in the air, reflect the sunlight on either side of the sun. The solar optical illusion always appears to the left, right or on both sides of the sun at about 22 degrees. Sun dogs are most common in the winter months, but can be seen anytime of year as long as there are ice crystals high up in the atmosphere. They have many different names, such as mock suns, ice halos, snow bows, phantom suns and parhelia.