My agency handles digital marketing for about 80 Window World stores, each with separate sites. For the most part, the content across all of these sites is the exact same, though we have slowly but surely been working through getting new, unique content up on some of the top pages over the past year. These pages include resource pages and specific product pages. I'm trying to figure out the best temporary solution as we go through this process. Previously, we have tried to keep the pages we knew were duplicates from indexing, but some pages have still managed to slip through the cracks during redesigns. Would canonicals be the route to go? (do keep in mind that there isn't necessarily one "original version," so there isn't a clear answer as to which page/site all the duplicated pages should point to) Should we just continue to use robots.txt/noindex for all duplicate pages for now? Any other recommendations? Thanks in advance!