Is there a way to move juice from one domain to another (either the whole domain or page-by-page)?
I was thinking on adding a
rel="canonical" on every page on the old domain linking to the new one, but will that pass the juice?
The main purpose is to keep the two domains alive so users can still visit the old domain (and allow them to go to the new one manually) instead of forcing a 301 redirect, at least during a few months before turning the old one down.
Related: Passing link juice through canonical link (it is 2 years old though)