"Frontiers in Neuroscience published one of the first studies using brain imaging to probe how our canine companions process words they have been taught to associate with objects, conducted by scientists at Emory University. The results suggest that dogs have at least a rudimentary neural representation of meaning for words they have been taught, differentiating words they have heard before from those they have not."
I also considered this question in my small study on sociology, which was written with the help of such essay writing services. And I think that this assumption can be applied to other mammals.
https://news.emory.edu/stories/2018/10/esc_dogs_process_words/campus.html
