That post where you have listed furryartists, under Saltypoundcake link the picture on the right appears to me Markwulfgar's art rather than Saltypoundcake.
it is totally possible that I ran too fast and flew too close to the sun and mixed things up. sadly I can't reverse search this image on any of the half dozen sites & tools I know about [thanks to a kind DMer for introducing me to some new ones today]
so, yeah, if you or anyone else has a link to a post that confirms who gave us this big beautiful boy, that would be greatly appreciated by all
UPDATE:
an anon found it on the furaffinity page for markwulfgar! I forgot how very great—and very nsfw—the uncropped image is
Un lobo Mexicano que le gusta enseñar lo que viene manejando <3. ___. A mexican Wolf that likes showing what he's got <3. ___ ...
