While there's still a fair sized backlog of word requests, not many of them are requests to switch words from common to rare. I'm going to try to deal with all of these over the next few weeks. Some of them look as though they should be fairly straightforward - but there's always the temptation to delve into the details of a word, beyond what's required to decide the issue.
For instance, it seems that feedlots are not used in the UK and hence the word feedlot is not well known there. This really decides it - the word will be treated as rare in future. But the question was asked, do they have them in Canada? Well, I'm not quite obsessive enough to research the actual extent of the feedlot system around the world, but I can at least get an indication of usage of the word in various countries.
Going by the News on the Web corpus, the word feedlot is used more in Australia than anywhere else. The next biggest user of the word is Malaysia, mostly in connection with the "National Feedlot Corporation scandal". It seems that Malaysia does have feedlots, but the word has extra prominence in the media because of a financial scandal. The other two countries that are big users of the word are Canada and New Zealand. The word appears only 47 times in UK publications (compared with 1147 times in Australia) and these UK instances are in news stories from other parts of the world.