Currently we have anthrofied, humanized and the little-used feralized, but ponified and furrified are aliased to ponification and furrification. Whenever I've mentioned this inconsistency, people seemed on board that it would be better if the tags were all in the adjectival form.
Additionally, reversing this relation opens up the possibility of repurposing the -tion tags as transformation-focused tags (e.g. post #128942, post #128932 or post #306735).
Updated