I underwent an SEO campaign for a company that has 3 domains, for simplicity: 1) desired-domain.com 2) second-domain.com 3) third-domain.com He wanted to push desireddomain.com, only problem was that domains 2,3 had the exact same code and content and were pushing his preferred domain into supplemental results. He mentioned he rarely got sales through domains 2,3 so I explained it would be beneficial to 301 1:1 redirect 2,3 domains to desired-domain.com. I implemented the redirects and his traffic went up on desired-domain.com, slightly. I'm aware it takes time, but his call volume is down 90%. odd? It's been about 5 weeks after the redirects, and we came to the conclusion that he's only getting about 20% of the traffic he was receiving from domains 2 and 3. Is that typical of a 1:1 redirect? The most logical issue is that even though he wasn't generating online sales from domains 2,3 most of his call volume was coming from those two redirected domains. I also came to find out some time ago that we had another issue - domains 2,3 had some strange URLs indexed - duplicate copies of pages with no graphics. When we redirected to desired-domain.com, the URL errors were passed on too. Here's the strange part - the errors on domains 2,3 were not returning 404 errors, but on desired-domain.com, they were. Here's a basic example that would display all the same page: desired-domain.com/page1.php (correct) desired-domain.com/ramps/page1.php (bad) desired-domain.com/scooters/page1.php (bad) etc. for multiple category trees. Because of this, Google Webmaster account says you have 11,000 404 Not Found errors on desired-domain.com. At this point there were a few options: 1) Redirect all these 404 URLs to the homepage 2) Fix them so they're not 404s anymore (as they weren't in the previous domains (2,3) - but they'd still be duplicate content. 3) Take them out of index with robots.txt so there's not duplicate content and no error Doing some research, I found out about 20% of the indexed pages of 2,3 were indeed these URLs in error, but as mentioned, Google didn't see them as 404s on these previous two domains. I could also see this attributing to some of the negative call volume, but I'm not sure given they only accounted for about 20% of the indexed pages. So ultimately... 1) Is time the enemy here? 2) What's the best solution for those problem URLs? 3) More thoughts to drive up call volume? 4) Should I switch the second domain back? I've read a few warn against this, but I've never actually read a case about it and it could help to salvage those previous rankings. On a side note, I didn't create these sites and I think their structure and content issues are the main cause for their low rankings and problems. I'm just trying to hassle this monster. It's almost 10 years old and it's still a PR0. I did some SEM to help the rankings too. Your input is appreciated!