بـسـم الله والحـمـد لله والـصلاة والـسـلام عــلى رسـول الله، وبـعـد
Shaikh Ibn Baaz رحمه الله said:
“The Prophet صلى الله عليه وسلم said:
“There is no slaughtering (at the grave) in Islaam.” 
الفوائد الجلية من دروس الشيخ ابن باز العلمية (ص 11)
 Reported by Abu Dawood in his Sunan (3222) on the authority of Anas bin Maalik رضي الله عنه, and graded “Saheeh” by Shaikh al-Albaanee رحمه الله in al-Saheehah (2436) and he said: “It is Saheeh as per the condition of al-Shaikhain (al-Bukhaaree and Muslim).”
In India, SOME of the Muslims adopted this tradition from the Hindus, wherein, before the bride enters the house, a chicken is slaughtered in front of the main door and the bride steps in the blood before taking the step inside. (And this still happens.)
Another instance is that when SOME of them buy a car (or other means of transportation), they will slaughter a chicken and rub some of the blood on the bumper or the tires with the hope of preventing evil eye, etc.