Hi I also find my two piggys eat there veg as fast as I can give them it carrots is what they like best and cucumber is next and you can not go wrong with apples, I dont no about you but thease are all things I have in so dont find they spoil. some extra tips of what I find easy to give them is sprout leaves, carrot peelings, cabage cores and fruit peelings waste not wont not they are as bad as my dogs dustbins lol. I did read though that lettice should not be given as it makes them toilet well. I dont own a cat but my two 8 month old jack russells tease and play with them when they are in the run the piggys dont mind at all infact I am sure they tease the dogs back. I would not say that piggys are very quite they like to greet you with squicks more so when you have food, mine are in the kitchen and when I am in the room I will hear them banging around a bit but nothing you would not get used to. My children and I handled the piggys alot from bringing them home while young which makes them happy to be handled when older but I dont find they mind if you handle them or not, they are in a big cage so have lots of room to run around they do have there mad half an hour a few times a day though. Good luck you will be fine with your new piggys enjoy.