Today (which is the first full day I've had my fish) a lot of what she's doing is "sitting" and the bottom of her tank and barely moving at all. I read that this is just a "rest" and it is healthy for the goldfish but she just sits at the bottom enclosed into her pineapple that she likes to be in and doesn't come out for food. I got her to eat a single flake today but that's about it. Yesterday when I got her she zipped all over the place and was very active. Does this sound like she's just in shock from her new tank?