Can I give my tags thumbnaisl?

I was wondering if it’s possible to give all my tags thumbnails that I can display at the foot of each post?

For example, I have 3 tags for 1 particular post “dog, cat, bird”. Could I assign a small thumbnail of a dog to the “dog” category and so on with the other 2?

If so, what kind of code would I need to use to display them>?

Thanks in advance