I adopted a baby red eared slider last week. I went into the pet store to get a new heat light and someone working there asked if I wanted the turtle. They said if no one took it they were going to let it go, so I decided to take it. She is very small about a inch and a half across and I have her in a 20 gallon tank. I have had her for almost a week and she hasnt eaten, I have tried tot give her many greens and veggies and some turtle pellets and she hasnt eaten anything. What should I do?