What kind of daisies? Shasta daisies are a type of chrysanthemum and those are listed as toxic to cats, dogs, and reptiles (likely birds, too).
Look up the specific type of daisy you have or are thinking of planting with the words "toxic", "poisonous", and even "cats".
Edit: finally found that other site in my bookmarks http://www.cathelp-online.com/emerge...isonplants.php
Daisy is on the list.