My GP1 leapt off my shoulder and had his head and front legs wedged in the bag of parsley that DH was holding (DH was being too slow. Guinea had to do Self Service) 
There are a few lists further back Andrea- make sure you know what they definatly can't have (there's quite a few things that are poisonous. Some they should only have in small amounts. Some things will give them horrible wind/ gassy bloated tummy)
I give my hogs a salad plate with colour (Ohh releasing my inner Heston)
green-kale, cucumber,parsley
red- tomatoe, red pepper, strawberries, watermelon
orange- carrot, orange pepper
yellow- yellow pepper, sweetcorn, banana
purple- beetroot (raw)
white- apple pieces, celery, parsnip, yurnip , cauli stalks
Just pick a selection of veg (I give 5-6 , I try to give different for night and breakfast)
At least 2 of my 'sons' will eat veg. My two-legged son won't touch it.