Wasn't there some talk a while back about trying to bring back the mastodon by splicing some of its DNA into elephant DNA or vice versa?
We do have some aDNA from the permafrost and all that, but I'm not qualified to really opine on the matter. I don't think the elephant is even remotely related to them. That means I'm not sure how successful that would be, but there are experts on the matter who are more versed than I am. As far as I know, the species has no living relatives.
I suppose one could work backwards from there to find a common ancestor, but that is way outside of my wheelhouse. Biology has changed so much since I was in school. DNA was a thing, but it hadn't even been used in a court case. These days, the taxonomic order (domain, kingdom, phylum, class, etc) isn't really considered all that useful since we've done DNA sampling.
See:
https://en.wikipedia.org/wiki/Taxonomic_rank#Significance_and_problems
And, as for the second dog, the only reason I saw the extra dog was the two comments. One asked about the other dog. That wouldn't have made me look back, but then they responded about the second dog. That's when I went back to look at the image.
I looked. I scrolled down to make sure of what I'd read. I looked again. I scrolled again. It took several tries, with the final try taking a good 15 seconds to notice it.
I'm reminded of the old memes. "Once you see it..." Or, perhaps, "What has been seen can not be unseen."
It doesn't help that I'm partially colorblind.