Appearing on an altar: The hope of blessings from a “higher” power, including authority figures.
The Mesopotamians, Babylonians, and Hebrews all had religious sects that offered animals to their gods and goddesses to gain favor. Alternatively, guilt feelings related to something perceived as a sin, for which you wish to atone through an offering.
Partially eaten flesh: Exposure; feeling like you’re at the whims of some predator in your “territory.” Also a painfully blunt reminder of mortal limitations. Likely, your emotional state is jagged, torn, and overly agitated by these sensations. You need to regain some stability.
If more than one animal devours the carcass, this signifies someone being pulled in two distinct directions, both of which seem unhealthy. Two or more forces are fighting for dominion in your life, and none has your best interests at heart.
For people considering becoming vegetarian, a disgusting carcass may signal your readiness to start heading in that direction.
Turning away from a carcass signals a change from mundane outlooks to an increased focus on metaphysical or religious matters.... The Language of Dreams
To dream of a carcass signifies the complete ending of an era in your life. There is no coming back or retreating from the fact that it is now over. Acceptance is the key to making the most of this ending. Dreaming of a carcass that moves or speaks implies the inability to accept that it is time to move on.... Dream Symbols and Analysis