The Alex have won just two of their seven matches this season and were beaten 5-0 by Swindon Town in their last league outing.
"There's one or two who need fishing out and are disrupting the togetherness of the squad," Davis told BBC Stoke. "That's up to myself and [assistant manager] Neil Baker to dig that out and find out why that is.
"Sometimes that can come about through not being in the team, but players have to be professional and deal with it. It's part of what being a professional footballer's all about.
"Whether you're in the team, or you're not in the team, you act and train the same way and you work hard to get back in. Some players don't do that. They would rather disrupt."
Crewe host Peterborough United on Saturday afternoon.