my horses move to the food once they see it. If you want to train them to eat from a bowl then you have to create the feeding ritual for them.
put the bowl in the same place all the time
make sure they see you putting their food in the bowl at feeding time
always feed at the same times during the day/night
you should be feeding at least twice a day
They will eventually congregate arond the feeding area at meal time.
Good luck, Kevin