How old is old Scaboir in Harry Potter?

Answer 1

"Scaboir" is the name of a Snatcher in the gang led by Greyback. There is no indication of how old he is. But the question tends to point to the idea that you are likely talking about "Scabbers" or Ron's pet rat.

Scabbers who is also Peter Pettigrew is the same age as James Potter, Sirius Black, and Remus Lupin. He was a part of the group that called themselves the Marauders and was also listed as one of the makers of the Marauders Map. (Although we don't know how much he had to do with it himself because he was never in the same league as his three friends.)

After he faked his death he somehow became the property of Ron's brother Percy and later handed down to Ron.(human years:he's around 35,rat years:199 considering he was around 22 when he turned into a rat)