1- I can't see the photo for some reason.
2- looks like a prickly lettuce (ok to feed in moderation)
3-oxalis/ wood sorrel (do not feed)
4-hard to tell for me. It looks like it has been frost burned and mowed. may be a type of thistle.
5-cats ear (yummy tort food)
the last photo does indeed look like cats ear. my greek loves cats ear weed!