Two Type of Teeth

Man-Kzin Wars XIII Short story by Jane Lindskold, published in Man-Kzin Wars XIII (2012).

Set at the very beginning of the First Man/Kzin War, later than Niven’s classic “The Warriors”, but before humanity has anything like a complete understanding of what it’s up against. The main character is a doctor with an interest in xenology, living in a universe where the existence of aliens has only been recently confirmed – and that under very hostile circumstances.