Plants found in hay

[ThreeLittlePiggles]

Hi,
I found this throughout my box of hay. Can anyone advise on what it is ?

 

[Pound Shilling & Pig]

I can't say for sure but it looks like some type of sorrel. If it is, it is high in oxaletes so should not be fed to the piggies.
I would send the photos to the supplier too.

 

[ThreeLittlePiggles]

Thanks, I have done, spoke to someone over the phone and they said to send in pictures which I did but haven't heard back from them yet. Tried phoning again this morning and no answer as phone line is Mon-Fri 9-4. Have sent them a message.