Re: spam, mods might want to edit/remove the quoted post so it isn't improving the spammer's search engine rankings (number of times whatever it is is mentioned on the internets, etc).
Mine were on Purina for a couple of years then decided to go off it overnight - I tried for a couple more days on the basis that if they were hungry enough, they would eat it, then gave up
Was wondering whether to give it another go again.