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Looking at the old, joint site, it appears both new dentistry practices are listed at the top of the page with patients being directed to the correct site for their doctor of choice.  This to me seems an equitable solution for people landing on the old site.

For your Google search engine results, first I would clear up ownership of the Google+ account, and it appears this has already been done, though I can't tell who has what.  If you don't have the Google+/Google Places ownership, then claim them, as I see the business address and phone numbers are the same. Then you'll be able to change the website to the new page for that address.

All social media links on the old page lead back to the Farhoumand Dental page rather than to the social media pages.  Really, I think the Avanti owners of the old page are being fair and equitable in that page's management.

So now what you need to do is some SEO for the new site and wait.  Farhoumanddental.com has a pagerank of one, and the newer two pages have no pagerank yet.  When you're building a new site, it takes some time to earn pagerank, and the more time you put into updating your website, posting links on your Google+ page and social media sites, getting your address in proper directories and finding other inbound link opportunities, the sooner your pagerank will rise.  Also, if the old site is no longer updated, it will sink as the new site rises. Make sure you've submitted your sitemap for the new site, but rather than worrying about the old site, focus on building the new.

One thing I would do also is go to getlisted.org and claim all the listings for the new business and if you can for the old ones as well.  Then for the older ones I'd note on the listings that the business has closed and list both new ventures as on the current old site.

Are you selling your own manufactured goods or reselling someone elses? If you're reselling someone elses, don't they have images of their products already to use?  I think it's rare for a reseller to take all their own product images, but if you do because you feel it gives you an edge, I would use your own logo prominently rather than as a watermark.  Maybe you have an artistic presentation of goods that needs proprietary protection - that is the only case I can see for potential watermarking.

And, if you're selling your own goods, do you also sell them to others for resale?  I frequently need product photos from manufacturers for promotion by authorized sellers of their brands.

Different companies have different ways they let marketing depts retrieve images, and from my side, the easier it is, the better.  I've never seen anyone put watermarks on their images, but some create their sites so you have to go through a lengthy registration process and wait to hear back - huge pain in the kisser for me as I have to go to the client, they have to find the account, get it back to me, I enter it, oops, website says not that string of numbers, go back... etc.  Time suck warp.

Some companies make their images non-downloadable (though there are some workarounds and screen shots).  The ones I like best - just let me have the images, no mess, no fuss.  I am after all trying to sell their products.

Then, I brand a corner with the resellers logo, but not as a watermark; rather it's a notice that yes, this company carries this merchandise.  And for SEO, if the reseller branded image of the original product comes up in image search (which they do sometimes as I always fully tag out my images), then all the better.  If you're selling your own goods with no authorized resellers, I think I would brand a corner also - no watermark, just a logo, but only if for some reason your logo is not already on the products.

I would move the blog onto the mainsite so you'll get the benefit of regular updates on your primary URL and avoid the possible penalties for having too many links from another site on the same cblock.  Use redirects to get your traffic headed from the old to the new, and in the future, add new content under your main site.

Do a search for Farhoumand Dental.  At the bottom of the map inset on the right, click the link for claiming business ownership.  They will verify via address/phone number, which is still the same for Farhoumand rather than Avanti.  After you have properly claimed the business address, you should be able to change the website address to the new website.  Google is going to get their information directly from you, via Google Places.  Not sure if you can ask that the old Google+ page be taken down or not.

One tool I've begun to use more frequently is Search Queries in Webmaster Tools.  It doesn't tell me what keywords I'm not using already that others are, but it does give me insight into how people are already finding their way to our sites.  I look at the percent changes which show me trends in what people are searching for and use that information to add new content and more in depth information.

I use it wherever and whenever I can!  Sometimes I ghostwrite for clients, in which case they get the author credit, but currently I am listed as an author on probably 10 different blogs, all on Wordpress platform, though I'm not sure I've published under my own tag on all of them.  I do the research, the writing, and work with clients who get the author credit.

The more places you are listed as author, the better this is, in theory, for your Author Rank.  Google hasn't released the algorithm for Author Rank, but they do intend for you to use it consistently.  Unfortunately you can't even look up your Author Rank, at least not anywhere I've found.