i’ve had my 2 guinea pigs for 1 week and 3 days but they don’t seem to be eating the vegetables. i tried giving them lettuce, parsley, coriander, carrot, broccoli, apple and red pepper, but they havent eaten any of it. one of them nibbled a tiny bit of lettuce but there was literally no difference from when i put it in the cage. the petshop told me to give them cabbage, pepper, broccoli a few times a week so I'm assuming they’ve been given these vegetables at the store? they’re about 13 weeks old now but they are eating their hay and nuggets. is there a way to encourage them to eat their veggies? thanks