hi peter, ive changed this year to granulated garlic, it comes in a tub for horses but i only put it thro feed twice a week, only a ration and its allways eet up, got fed up with stinkin fingers with the fresh stuff, do you think drinking from green algae drinkers are bad for the birds, i have a old style loft with wooden slatted front and the daylight/sun is allways gettin green on drinkers, i normally clean off but have been noticing when walkin dog she will drink readilly from green algae pools but when offered tap water , nae so keen, jist like yir thoughts min, good posts by the way, keep em comin.