We learn new things about our animals, their care and management, and ourselves daily. It is easy to think back to 5 or 10 years ago and recognize how far we’ve come. It is equally as easy to leave some of the ideas (good AND bad) in the past, for that is sometimes where they belong. However, it is equally important to review some of those “old” ideas with the lens of increased knowledge and perspective gained over time (lest we let a good idea go prematurely). The concept of transfaunation (aka – fecal transplant, fecal microbiota transplant (FMT), stool transplant, etc) has been around since the beginning of recorded time in humans, and currently receives attention for specific GI bacterial infections. In domestic animals, it has been used for centuries to treat poor digestion and associated maladies. Recently, we’ve started to become aware of (and employ) the practice across a wide range of taxa in our care. This will be a brief discussion of the practice, some pertinent literature and examples, and how it might be something for you to consider in better managing the health and care of your animals (if you’re not already).