Hello. Me and the lady I work for have just been to a womans house to collect 8 gerbils. 7 of them have been taken to the centre but I decided to take the oldest one home with me as she was on her own and the rest are in groups. I havnt owned gerbils in years, so I need advice. Which is the best food to use? Do they need fresh fruit or veg? Can I use hay as bedding?