I recently started using sub domains. I'm wondering, should I make separate sitemaps for each sub domain? Or will Google be ok with putting all the sub domain data into one sitemap? That is along with the regular domain sitemap too. I wondered about this because the program I use to make sitemaps doesn't crawl the sub domains unless I modify the main URL to a sub domain. I guess it sees them as completely separate websites. I never thought about it until today. Does Google see sub domains as completely separate websites? I'm probably going to use the WordPress plugin for my blog sub domain, so that will be separate.