Bruce said Davies should take inspiration from Southampton striker Rickie Lambert, 31, who has forced his way into the England reckoning.
Bruce said: "Curtis has started the season and played very well.
"When you look around, there are not that many young centre-halves pushing for a place in the England squad. Why shouldn't he be looking in that direction?
"Look what Rickie Lambert has done. Who knows what might happen? Never say never."