the spider consumes the millipede

A car consumes fuel when it is running.

a tiger spider consumes its head

Glucose is the most common fuel the mitochondria consumes.

A consumer is considered anything that consumes to gain energy to live. There are three general types of consumer: a carnivore(consumes meat to survive), a herbivore(consumes vegetation to survive), and what you were referring to, an omnivore(consumes both meat and vegetation). So the answer is yes.