ok, in folklore, vampires drink blood.
So, if you dun wanna drink that,
1). You can drink your own blood. i.e. KTY go bite himself and
drink himself. meaning recycling his own food. 
2). Try animal blood. which is perfectly normal and ok. EVEN HUMANS
are eating pig's blood and duck's blood. like zhu xue and ya xue,
etc.
Convert drinking blood to eating medium rare or rare beef.
3). Even ONLY human blood suffice, then try breeding humans and
drink them. take them as some cows that you milk lor.
4). Since vampires dun die, they should be rich also and given so
many abilities, therefore they can invest much much money to the
research of artificial blood etc (in the excuse of blood
transfusion), then KTY can be director of research and drink all
you want.
5). Go steal from blood banks.
6). If dun wanna drink blood, DRINK ALCOHOL....remember ALL MAMMALS
subcome to alcohol...and once you are drunk, you just want to sleep
and wont feel hungry.
my 2 cents worth.
