We have an online toy store, the domain is old over 10 years and we have some traffic, we are considering to change our domain name. There are two reasons why. First of all, we expand our product category, before we were only a puzzle store now we sell almost any kind of toy. And at this point, our current domain, PuzzleZoo.com is not representing our capacity. We also have toyzoo.com domain registered, that is also an old domain but there has been no activity with that domain. Our concern is, how do we avoid to lose ranking and keyword authority, are we going to start from the ground? What are the correct procedures to follow during this switch if we prefer to switch? As an alternative scenario, if we decide to keep both and open another e-store with toyzoo domain name and continue operating PuzzleZoo.com, with same products, will taht be a duplicate issue? If it is what are the consequences? (Just to add a note here, our  PuzzleZoo is also a small brick and mortar store chain in CA and TX) ToyZoo will only be an online store. Even in this case at the eyes of Google, are we going to have a duplicate store that can potentially be penalized or PuzzleZoo being a brick and mortar store chain might help us to avoid being penalized? Should we switch the domain and redirect PuzzleZoo to ToyZoo, should we keep them both and running separately? We need to give a decision and I was wondering if there are any expert here that can give us a good intelligent advise on which path to go?