Oh, yes i could hold them, they have moved to their new owner, when they were 6 weeks old.
When they were playing and they got tired they climbed up to my lap and fell asleep there.

You need just to train him, every day.
I don't know how much you know about these rodents, they are not like domestic rats. They are intelligent and smart, they can learn to do a lot of things.
Have you seen the movie about the GP rat that goes to the toilet, wonderful.

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