Great pictures of the cuties! I've owned 2 guinea pigs for several months now & have been able to introduce different fruits & veggies. It helps to try to feed it to them by hand. Make yummy sounds & such to get them interested. My vet told me that their Mom would normally be teaching them what to eat. Little by little, they started to like things I thought they hated! Ginger & Olly now like leaf lettuce, chicory, kale, parsley, carrots, broccoli, apples & pears. I've tried cucumber (with seeds taken out) & they seem to enjoy it. They sometimes eat spinach, but I read that it isn't good to feed them too much. That goes for parsley & kale, too. I think they have a lot of calcium, although they do have a lot of vitamin C. Variety is key. As for the pellets, they say it's ok to feed young pigs alfalfa based pellets, but my vet does not recommend it. Instead, I order pellets online from OxBow (Timothy Hay based) which the piggies love. It also has a stabilized form of vitamin C. So far, the littles ones are happy & healthy.