Try offering your Blood a thawed item at night. Just place it at the opposite end from the snake, cover the tank, walk away and don't disturb it until you peek under the towel the next morning.
Bloods are *very* insecure snakes and it can take a while to get them eating. The more you disturb it by even being in the same room (let alone watching it), the less likely it will be to eat.
Once it's eaten a few times, it'll start eating in front of you, but until you reach that point, don't treat it like any other snake 'cause it's not