Does it take time for guinea pigs to get used to eating vegetables? The 2 little guys I brought home last night seemed terrified of the veggies I put in their cage and when I woke up this morning nothing was touched. I know the previous owner was using the drops in the water so they were probably used to that but there's no way I'm doing that. How long should I wait and see if they'll eat any veggies before I syringe feed them a little bit of vitamin C?