Which is better slaughtered as sacrificial animal, sheeps or cows?

Question 3: Which is better for sacrifice, a ram or a cow?

Answer: The best animal for sacrifice is a camel, then a cow, then a sheep, then a share of a camel or cow, because the Prophet (peace be upon him) said concerning Jumu`ah (Friday) Prayer… read more here.

What is the ruling on Ud-hiyah meat (sacrificial animal)?

Question 1: What is ruling on the Ud-hiyah (sacrificial animal offered by non-pilgrims)? Is it better to distribute the meat cooked or uncooked? It is said that it is impermissible to cook or break the bones of the meat of the third to be given in charity.

Answer: Ud-hiyah is a collective Sunnah (supererogatory act of worship following the example of the Prophet), whereas some scholars are of the view that it is an individual obligation. Distributing it cooked or uncooked is a flexible matter… read more here.