It has to be fed raw but it does not hurt to freeze it and the enzymes stay viable for several months frozen. (vetinfo.com)
This, we expected, would reinforce their capacity to compete, stay viable economically and, ultimately, deliver stronger academic achievement. (educationnext.org)
It is a sure sign of spring when they return, and it would be a shame if we don't help their numbers stay viable so the birds will always be there. (montrealdogblog.com)