Wow i am glad you pointed that site out, i fed it to him today and he appears to have eaten it, it was only one strand of it though, i quite regularly use that site but hadn't seen that one before, i think i will stop with feeding him that to be on the safe side. Thanks everyone for the replies!
Medicinal Action and Uses---Diaphoretic, astringent, tonic, stimulant and mild aromatic.
Yarrow Tea is a good remedy for severe colds, being most useful in the commencement of fevers, and in cases of obstructed perspiration. The infusion is made with 1 OZ. of dried herb to 1 pint of boiling water, drunk warm, in wineglassful doses. It may be sweetened with sugar, honey or treacle, adding a little Cayenne Pepper, and to each dose a teaspoonful of Composition Essence. It opens the pores freely and purifies the blood, and is recommended in the early stages of children's colds, and in measles and other eruptive diseases.
A decoction of the whole plant is employed for bleeding piles, and is good for kidney disorders. It has the reputation also of being a preventative of baldness, if the head be washed with it
That website is pretty handy. As soon as I found it, I bookmarked it knowing that I would need it time and time again. All the other "Plant Identification" websites didnt have pictures, so it was a little tough to click each one and google the latin name, etc. This way you can just click the picture and it tells you if its tort-safe or not. Too bad about the yarrow, Im sure in small quantities it wouldnt do any harm, but Im not going to bother. I have so much of it in my yard too.
I have fed Yarrow for the last 4 years... none of mine in that time have had any ill effects from doing so... and all will eat it... i disagree with the tortoise table on this one...