Hello i got my first axolotl about a month ago. The pet store owner told me gravel and small rocks was juuust fine, nothing to worry about, so sadly i trusted him. Right now i'm furious at him as my axolotl has obviously swallowed a few small rocks. I can see atleast one clearly in his/her stomach as it is see-through. We quickly removed the stones. This morning i wake up to see two small rocks laying on the bottom so i'm hoping he pooped them out. But i'm still scared they were left over stones we forgot. Is fridging a good idea in this situation since i heard it slows down his metabolism, while i want him to pass the stones. Also i'm giving him frozen blood worms, right now i wont trust any pet store owner and would like to get tips from the experts. Are blood worms fine to feed him? Also how many times a week? (He/she is almost a month old)