No!
He would go to war with it.
That's something foreign and he needs to defend his territory.
Again we need to be reminded that many creatures that we don't think of as sentient beings actually are. I am reminded of the scene in "The China Syndrome" in which the reporter comes home after a trying day and is greeted by her large turtle who comes to her as she enters the door. She picks him up and carries him around for a bit which he seemed to enjoy.
I just wish I would have thought about doing a short video of his rant on my cell phone, then you all could have heard how loud he was and the angry look he had on his face. It was hilarious.
But then in after tought it would have taken me awhile to learn how to upload it to here.
Probably we have all seen the youtube video of the large tortoise that was on his back and unable to right himself. His friend, another tortoise, worked and worked to get him turned over and finally accomplished it. It was absolutely deliberate. These creatures feel, and think.
Oh found it:
The video of the rescue that follows of a humpback whale is educational too.
Thats really sweet.

But they are desert tortoises. They are much more in the gental nature of turtles and yes they do help each other when in trouble.
But Mikey is a water turtle- a red eared slider. They are all over in our swamps like Louisiana
They are mean, aggressive, and territorial, he would fight another turtle especially if another male was put in his habitat.
Its run or kill in their world because crocs love to eat them.