Question: Must young children wait between eating meat and dairy?

Short Answer: Yes, a young child, possibly as young as two or three, should ideally wait at least an hour before eating dairy after meat, unless doing so would be unhealthy (i.e., the child needs a bottle).

Question: May you eat meat that was shipped from a kosher store but without an identifying seal?

Short Answer: Yes, the meat is permitted, as long the akum would derive no benefit from exchanging the meat with a non-kosher alternative. Nevertheless, ideally, one should only send the meat if it is sealed.