Some mammals have a thick coat of hair to provide warmth. Almost all mammals have seven bones in their neck. What Mammals Eat Most mammals are herbivorous, that is, they eat plants. Some mammals are carnivorous. They eat animal flesh.
Some mammals eat both plants and animals.
They are omnivorous mammals. They have teeth that can grind up flesh. They include bears, hogs, opossums, and human beings. In sexual reproduction, a sperm unites with an egg in a process called fertilization. The fertilized egg develops into a new individual.