I have a question and was wondering if this is normal. We have a 20 year old standardbred. We have owned him for about 6 years. He was very mild when we got him and my then 8 year old duaghter took him as her first horse. He has always been the horse we let new riders train on. He has never been domanite or agressive toward other horses.
This summer we had lots of rain in western Ky and since this horse doesn't get road much any more he gained a lot of weight from all the grass. Now he has decided he is the Alfa male in our group. He becomes very agressive during feedings and seems to be very hiper when I take him on rides.
Is it normal for a mild horse to change and become the domenate one among the other horses? He looks healthy but it does have me worried.