There are many types of cat grass that cats eat, and wheat is not the only one. Wheat is just one of them, as well as oats, barley, dog's tail grass, catnip, etc. are all cat grasses that can be eaten by cats. These different cat grasses contain their own unique nutrients and play different positive effects on the health of cats. 
As a common cat grass, wheat has the advantage of being rich in dietary fiber and vitamin B, which helps cats to motility and promote digestion. However, other cat grasses also have their own unique nutrients and effects. For example, oats can lower cholesterol, barley can help digestion, and dog's tail grass provides rich dietary fiber, which provides protection for cats' gastrointestinal health. 
Therefore, when choosing cat grass for cats, we need to choose the right species according to their specific needs and preferences. At the same time, we also need to pay attention to a few key details. First of all, it is important to ensure the quality and safety of cat grass. When purchasing, you should choose regular channels and reputable brands to avoid buying low-quality cat grass that may contain pesticide residues. Secondly, it is also very important to control the amount and frequency of cat grass eaten by cats. Although cat grass is beneficial for cats, excessive consumption or long-term consumption may trigger adverse reactions such as gastrointestinal upset or poisoning. Therefore, we need to exercise reasonable control. 
In addition, we need to closely observe how cats react when they consume a new species of cat grass. As soon as any abnormal symptoms occur, discontinue consumption immediately and consult a veterinarian for advice. At the same time, we should also pay attention to the combination of cat grass and other foods to ensure that the cat's nutritional needs are fully met. Finally, the preservation method and time of cat grass are also the key points that need our attention. Cat grass should be stored in a dry, ventilated place, away from moisture and direct sunlight. At the same time, it is also necessary to pay attention to the shelf life of cat grass and avoid eating expired cat grass. 
In conclusion, giving cats to eat cat grass is a beneficial behavior, but it requires our meticulous care and care in the process of selection and consumption. At the same time, for cats who have never tried cat grass before, we recommend starting with a small amount and gradually increasing the amount and frequency of consumption to allow the cat to gradually adapt to this new food**.