There is an expression used several times in Parshat ראה that needs explanation. The Torah says, כצבי ואיל תאכלנה, that you shall eat it like the deer and the hart.
The צבי and איל are examples of חיות, non-domesticated animals. These animals are not fit to be offered as קרבנות. Only the animals that are defined as בהמה, domesticated animals, are permitted to be offered as sacrifices.
When the Torah tells us that an animal may be eaten like the deer and the hart, it refers to permission to eat meat that is not part of a sacrifice.
This is what is called, בשר תאווה, or lust meat. Originally, the only meat that was permitted in the desert, was partially offered as a קרבן. Later, all meat was permitted without any restrictions. This is why the expression כצבי וכאיל is mentioned. Just like their meat is permitted with the only restriction that it be slaughtered according to Halacha, now, even the meat of the בהמה can be eaten without restrictions.