Weeds

Just been reading the blog about cooking greens and decided to ask for advice about weeds.  My chooks are in a run so don't free range around my garden.  I collect grass, dandelion leaves, young nettle tops stolen leaves from the purple sprouting in the veg. patch.  Are there any weeds I should avoid (I don't pick ivy).  Is it ok to give them the leaves from celandine and creeping buttercup - please say yes - we are over-run with the stuff!

Would it be possible (or is there already) a site sticky for toxic and poisonous plants and foodstuffs that are not suitable to be put into chicken runs.
It seems most plants are not good for specific animals or bad in large amounts .

A simple 'don`t its not worth the risk' list without technical jargon would be just what beginners need.If they need more info they can go to the detailed lists later.

Avoid

Avocado
...........
..............
...................

Kev