Cazjohn Posted January 30, 2012 Share Posted January 30, 2012 Hi All, I am about to vaccinate some day old chicks for Mareks, while I have the vaccine open can I vaccinate the slightly older chicks as well, they are now three weeks? Thanks in advance, Caroline Quote Link to comment Share on other sites More sharing options...
Redwing Posted January 30, 2012 Share Posted January 30, 2012 yes you can it can be used up to 6 weeks of age but the successs rate declines the older they get I believe Quote Link to comment Share on other sites More sharing options...
Cazjohn Posted January 31, 2012 Author Share Posted January 31, 2012 Many thanks Redwing, Reading Spex on and off I go! Quote Link to comment Share on other sites More sharing options...
