If it were me I would cut the thorns off and then feed. That's what we do to cactus pads too. We burn, scrape or cut off the thorns.
Welcome!
It looks like a chicory to me, as do at least two of the other plants; chicories are similar to dandelions so safe.
I don’t usually worry about thorns but better to be safe than sorry with a little one.
I was going to say it looks like thistle before I read your post. I feed several types of thistle to my torts. I've never cut the spines off of any of it.
I have thistle pop up in my yard all summer. Some are relatively small, with spines that are not too bad but cover the leaves almost like sparse fur. Another is also petite but more waxy-leafed with long fairly thin, long spines. Others are much taller, woodier, and have steel daggers for spines!!!
Can torts eat ANY thistle and do you remove the spines for smaller torts, like my Russie?
I just called the seller, He said it was a kind of thistle and it's okay to feed . Thank u for kind reply!!