We have 6 4wk old chicks but one Easter Egger doesn't walk upright like the others and actually hunches when she moves. She is unstable and falls to her side like she is dizzy. She will not perch but eats and drinks normally. She is on vitamin water and loves scrambled eggs for a treat. Read today about giving her calcium (crushed up egg shells). Not sure what else to try,. Any advice would be appreciated! Thank You!