It could be. There are real - life situations where baby reindeer are part of various stories. For example, in Lapland, there are accounts of baby reindeer being born and raised, and these real - life happenings can form the basis of a 'true story'. Their life cycle, from birth to growing up under the care of their mothers or herders, can be quite fascinating and might be what such a story is about.
If we consider a more general view, in some regions where reindeer are native, baby reindeer might be part of a herd managed by indigenous people. The cast (assuming you mean group) of baby reindeer would grow up learning from the older reindeer in the herd. They'd learn how to forage for lichens, which is a major part of their diet, and how to migrate to different areas depending on the season. Their real story could involve survival in harsh Arctic or sub - Arctic climates, dealing with snowstorms and limited food resources during the long winters.
It's hard to say for sure. If it's presented as a memoir or based on actual experiences, it could be true. But if it's labeled as fiction, it might just be an imaginative tale.
It's hard to say for sure. Stories about baby reindeer can vary. Some could be true accounts passed down, but others might be made up to capture our imagination.