I have a mare and gelding paddocked together with no problems normally. The gelding is not rugged as a rule but the mare (whom I compete) is. Yesterday I put a new mesh rug on the gelding to help to reduce fly and mosquito biting and the mare started squealing at him. I locked them in separate yards side by side to give her time to get used to him for an hour but when I let them back out into the paddock she started chasing him and backing up to kick at him. She did eventually settle down but this is the second time this has happened and I am really starting to wonder if there is a problem. The first time I put one of the mares old rugs on him just to keep him clean before an event and she really went to market on him. The poor boy didn't know what to do as he is normally the dominant horse. I had thought that it was just because he smelt like a mare with her old rug and this may have confused her, but as this time it was a new rug it must be something else. Does anyone have any ideas as to what could be going on, or is she really that silly that she cannot recognise him when he has a rug on?