Hi! Thank you for all your replies.
I contacted the producer asking for the name of the plant; I'm waiting for their response. The hay comes from Germany, from a field a family grows and sells inside the country and abroad (I'm from Spain). I would imagine that they have some short of control of what grows in their fields... I have managed to identify red and white clover, chamomile, dandelion, and maybe nettle and plantago (mixed with a variety of different grasses).
I never had any health problem with my bunny related to the hay they shell, not even with the "mysterious" plant... so I'm thinking maybe it's parsley (?)
I'll tell you when I get a response from them. Thank you!
