Avocados might help.. vitamin E.
No doubt you all know how good avocados taste and how healthy they are, but bear in mind this suprising fact from wikipedia-
"There is documented evidence that animals such as cats, dogs, cattle, goats, rabbits, birds, fish and particularly, horses can be severely harmed or even killed when they consume the avocado leaves, bark, skin, or pit."
Of course, I would only ever eat the green stuff inside anyway.