No. The food requirements of all living organisms vary. On the basis of food requirements, living organisms are grouped into three categories:
(i) Herbivores: These animals eat only plants or plant products. For example: Cow, elephant, rabbit, horse, etc.
(ii) Carnivores: These animals eat other animals. For example: Lion, tiger, lizard, etc.
(iii) Omnivores: These animals eat both plants and animals. For example: Dog, cat, crow, etc