Grass and Vomiting. Because many dogs eat grass when their stomachs hurt, it's not uncommon for a dog to eat grass and then immediately throw up. The vomiting could be completely unrelated to grass. It's also possible some types of grass help to induce vomiting and eliminate bad foods from your dog's stomach. In short, the grass may induce vomiting or grass-eating may be more likely with a dog who is already going to vomit. Veterinarians are split on this issue.
A personal reference letter should provide information on who you are, your connection with the person you are recommending, why they are qualified, and the specific skills they have that you are endorsing. It should also include specific examples of times they demonstrated these skills.
In general, a reference should contain the author name, date of publication, title of the work, and publication data. When you cannot. find the example reference you need in the Publication Manual of the American Psychological Association, choose the example that is.