Remove SA from only one database

Hi There,

Slightly strange request here (I seem to have a lot of those...), but we are changing our trading system. We would like to use our existing SQL server, but don't want our current vendor to know we are moving (yet). Due to historical reasons, they use the SA account to login to SQL (moving forward this won't be a problem).

We would like to create a new DB for our new vendor and hide this from the SA account. Is this possible?

We are running SQL Standard 2016 on Server 2012.

Thanks,

Bryn