racehorse needs an age!!!

Can anyone tell me where to find my race horses age?? He has a tatoo and the vet thinks he's qh.

For TBs, the first letter is the year of birth:
Tattoo Chart
A=1971
B=1972
C=1973
D=1974
E=1975
F=1976
G=1977
H=1978
I=1979
J=1980
K=1981
L=1982
M=1983
N=1984
O=1985
P=1986
Q=1987
R=1988
S=1989
T=1990
U=1991
V=1992
W=1993
X=1994
Y=1995
Z=1996
A=1997
B=1998
C=1999
D=2000
E=2001

Im not sure about QHs though