I just brought home 7 new Shaver RSLs. They are approx. 45 weeks old. They looked healthy and happy and were very well handled so I brought them home. They couldn't get up on my roosts and they were going to just sleep on the floor on the coop! I picked each one up and placed them on the first rung and they all tried to clammer up to the top but were flapping and falling off. I picked them back up and placed them closer to the top were they settled in for the night. I think they are really over weight. They have never seen sunshine and don't get much excersize. How can I get them more fit and agile (they didn't even know how to use the chicken door to get outside)? Should I limit their feed?