I agree that if we wish to tread the path of a Bodhisattva to full Enlightenment, then we will think of every sentient being as precious. This is what is stated in the first verse of the Eight Verses of Thought Transformation that contains a powerful practice to develop bodhicitta.
"With the thought of attaining enlightenment
For the welfare of all beings,
Who are more precious than a wish-fulfilling jewel,
We will constantly practice holding them dear."
If all beings, including animals are precious to us, then we would not even think of killing them just to eat their flesh, which are only made tasty by the seasoning and the sauces. We would not pander to our gross craving of meat which is , in actual fact, the carcass of a being that had been alive and full of zest for living, just like us humans.