Sacrifice

 Substitutes of 

1. pāyasam (pudding) and 
2. āmikṣā (curdled milk) 

mentioned in the earlier works instead of cow sacrifice 

http://www.hindupedia.com/en/Anubandhy%C4%81
https://www.youtube.com/results?search_query=cow+sacrifice
http://www.slideshare.net/search/slideshow?searchfrom=header&q=cow+sacrifice

due to ill effects of beef
http://freeglobaluniversity.blogspot.com/search/label/Beef