The term 'Grassy Pet' can be solved by the four letter word CHIA. CHIA is a type of flowering plant native to Mexico and Guatemala, and is a member of the mint family. It is known for its edible seeds, which are high in omega-3 fatty acids, fiber, and antioxidants. CHIA seeds are often used as a topping for salads, smoothies, and other dishes, and can also be used to make a popular pet called a CHIA Pet. CHIA Pets are terracotta figurines that are covered with CHIA seeds, which sprout and grow into a grassy coat.