Winter coat in the summer and summer coat in the winter
I have a 4 year old gelding and for the past 2 years I have noticed a BACKWARDS shedding pattern. For example, by the middle of June, he grew a thick winter coat. He began shedding this coat in October and now is completely slicked out. He is otherwise healthy and his coat is very shiny. He had a similar shedding pattern last year but I did not keep records of the exact dates.
I have done tons of internet research but I don't ever find anything about shedding patterns that are completely backwards. We have moved to several different barn since last year, but the shedding patterns were pretty consistent in the past few years.
Any ideas as to what would cause this type of shedding pattern?
Thank you for your help!