Hi, I've been treating a pullet for the past couple of weeks for Cocci/ Capillary worm infestation. She's been making a slow recovery, but has some vision problems. I researched this and discovered it is from Vitamin A deficiency caused by poor absorption through the digestive tract, usually as a result of Cocci/ Worm infestation. The reference recommended Cod Liver Oil for treatment but cautioned against excessive use as it can be toxic. It said something about 2 per cent Cod Liver Oil, but I'm not sure what that means. Has anyone tried this and how much did you use, or do you know of another way to quickly and safely supplement her Vitamin A intake? She's a 5 month old Lavender Orp. Please and thanks in advance.