You're getting greyhounds mixed up with horses mate. If a greyhound is born in October it is 1 year old the following October.
Think you'll find they are both the same tote it definately does in coursing greyhounds and they run the stud book
Y.I.S Leview
Tote is right a greyhounds year runs until the last day of the month 12 months from that which it was born, october whelp is 1 on sept 30
http://www.ngrc.org.uk/rule_book.asp?rule=39
No tote is wrong that may well be ngrc ruling not ncc ruling as has been pointed out to myself due to coursing having an open and closed seaso