During the season, yes, as I said. At the cut from 90 to 53? I don't think so. This is the closest thing I could find to explain it - these guys are all released in cuts, so they can sign anywhere they want, including another team's PS:
https://www.sbnation.com/2016/9/3/12...ibility-primerA practice squad player can be signed by another team, as long as the signing team adds the player to the 53-man roster.
A practice squad player cannot be signed to another team’s practice squad.
A player can, however, be signed to another team’s practice squad if their original team releases them.