Type of Thistle?

[lismar79]

There are a few weeds that I assumed were Thistle that are not & are poisonous such as Prickly Lettuce. So here I am making extra sure that this is able to be feed to my Russian & Sulcata:

 

[Tom]

I don't remember the name, but I feed that one to mine regularly.

 

[tortadise]

Yeah those are ok. I think it's milk thistle.