If you refer to Genesis 9:2 (you won't be defiled by looking it up), its pretty clear from the text that the relationship between man and animal was very different before the flood. It was only after the flood that animals had their fear of man. Noah wouldn't have to 'wrestle' a juvenile away from a parent.
Further, if you think for just one minute ... given the time-line between the completion of the ark and the coming of the rain (7 days) does it not seem reasonable that the animals came to him?
Your comment about your particular dino being only on one place on Earth is merely an unverifiable assumption on your part. You assume that is the only place they lived because that is the only place that fossils have been found.
Seems like recognizing an unverifiable assumption would be part of a "rational critical thinking" process ...
It seems like one of us wasn't paying attention in their collegiate critical thinking class. You should try to re-familiarize yourself with terms like logic, reason, probability. There is a tremendous divide between assumption and inference.