Right now the horse is doing well accept for food aggression. Not sure why this developed, as he has always been well feed and cared for (no abuse or neglect in his past). Oddly, even when I am bringing him hay...he acts as if I am trying to take it away, He crouds and a couple of times has bucked and kicked. I think we have gotten the bucking & kicking mostly under control (but see below).
We have a colt that we plan to put in the same pasture as the gelding but am concerned on the level of aggression the gelding is displaying. Right now they are in pens beside each other. They get along until feeding time. One day my husband put their feed buckets on the same fence (but different sides). The colt moved over to the geldings bucket (he couldn't actually get to it) and stuck his nose through the fence to try and get the feed (much like he did with his dam). The gelding had a fit, rearing up and trying to kick.
Obviously they are a long way from being put in the same field together.
Any suggestions on how we might combat this aggressive behavior.