Back then, it has been a tradition to slaughter a chicken and offer it to the family member who is celebrating his/her birthday. My mama would usually boil a pot of water early in the morning at the dirty kitchen using the wood we buy at a nearby 'sari-sari' store. We had a small kerosene-stove to cook our daily meals, but during special occasions where relatives and friends usually come to our house, we use the special stove outside fueled by the dried wood. My papa would then select the (un)lucky chicken in our little chicken coop and wakes up the birthday celebrant. He would then pull a few feathers off the chicken's neck and sharpen the knife he'll use. I would usually volunteer to hold the wings while papa holds the neck to cut a slit from it. Blood oozes out as the chicken tries to grasp for air. Papa then collects a few drops of the blood from the chicken and draws a cross at the celebrant's forehead. It is for luck, they would always say. Mama will then get the slaughtered chicken, put it in the pot of boiling water, dress it, and magically cooks it to a sumptuous meal shared to everyone.
I've been searching about the same practice in the web and found a magical spell that uses chicken blood and forehead(s), but that one's scary. Our family tradition is on the lighter side (I think). So for good luck, good health and a lot of fortune, buy a living chicken and draw a cross in your forehead with its blood (to be done only during birthdays).