These type of "unexpected changes" are the same thing that made covids species crossover possible. It's hard to deny that COVID was a huge stressor on our population, my theory is that prolonged stresses on animal populations makes a sicker population and as more animals are forced to be in close proximity to humans these illnesses will cross over more often... There are is only one option preserve the ecology.

Current environmental and ecological destruction is going to bring suffering beyond our comprehension. The situation is dire.