Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to diagnose chronic vomiting in cats [title] Be aware that if your cat eats grass a lot, she may be a' happy' vomiter. [step] A key sign of a happy vomiter is a cat that is otherwise well but has a tendency to eat grass and make herself sick. This is a predictable chain of events that you can generally observe on more than one occasion.

Ending1: [substeps] Food allergies can also be quite common. In the united states, the easiest way to see if your cat is wanting grass is to observe her taste it. Ending2: Cats are unlikely to eat grass since not all can carry it, but there may be enough that can be fed out. [substeps] If your cat is an eater of grass, there is probably a chance that they do eat grass. Ending3: [substeps] Anxiety the cat loses her ability to remember associated events that may lead to a consumption of grass. Generally the kitten becomes more anxious after a meal. Ending4: Some cats make themselves sick once every two or three days, while others only make themselves sick once a week. Once they have induced vomiting they are content to wander off and perhaps even look for a snack.

Answer format: ending1/ending2/ending3/ending4