See - https://www.theguardian.com/environment/2021/jan/10/wild-deer-set-to-wreak-havoc-in-uk-woodlands-as-venison-demand-plunges - eating British venison is actually helping preserve woodlands right now.

I fell in love with Marigold yeast many, many years ago. A guy at work used to bring in a small pot for lunch and let me share some now and then. Yum!