Zevachim 8:2-3

Zevachim 8:2

If animals for sacrifices got mixed up with other sacrifices of the same type, then each is offered without specifying the owner who brought it. If animals for sacrifices got mixed up with other sacrifices of different types, they must be left to graze until they develop a blemish, at which point they are sold and the money is used to bring a sacrifice of the same type worth the best of those animals. One must make up the difference in price from his own pocket. If sacrifices got mixed up with a firstborn animal or animal tithe, they must be left to graze until they develop a blemish, at which point they are eaten in the manner of the firstborn or tithe animal. All sacrifices are subject to being mixed up except for sin offerings and guilt offerings.

Zevachim:8:3

If a guilt offering got mixed up with a peace offering, they must be left to graze until they develop a blemish. Rabbi Shimon says that both of them must be slaughtered in the north of the Temple courtyard (in the manner of the guilt offering) and eaten in the manner of the more stringent sacrifice (again, the guilt offering). The Sages said to him that we don’t invalidate holy things (by artificially reducing the number of those who can eat the peace offering and the time frame in which it can be eaten). If pieces from different kinds of sacrifices got mixed up – those of greater sanctity with those of lesser sanctity or those that are eaten in one day with those that are eaten over two days – then they must be eaten in the manner of the more stringent sacrifice.