My piggies get fed twice a day, and we have a food dish for each piggy strategically placed to minimise stealing, or we scatter feed veggies on the floor amongst the hay.
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@sport_billy says veggies are essential, much more important than pellets, and if you can hand feed some of the veggies you can make sure each piggy gets their share.
Hay is the most important food, and tipping a big pile of hay on the floor with some chopped veggies and salad leaves mixed in is the best way to encourage sharing and natural foraging behaviours!
My piggies usually get a slice of cucumber and a slice of red pepper and some sort of leaves (baby leaf salad, coriander, spinach, parsley, romaine or little gem lettuce) each daily, chopped up if its bigger pieces so no pig hogs all the veggies! They also get beansprouts once a week and either carrot or babycorn slices as a treat. We feed very few pellets- about 12 pellets per piggy per feed, which is about 5g per piggy per day, and a few times a week we skip the breakfast pellets and dont bother with dishes and just have hay and leaves or herbs in a big pile on the floor!