The assumption that dogs who suffer from Inflammatory Bowel Disease (IBD) would show gastrointestinal symptoms more frequently than dogs which suffer from atopy and again that those dogs have more frequently gastrointestinal symptoms than healthy dogs could not be confirmed in this work. The existing data does not allow a determination of statistical significance due to the different survey of the IBD group and the comparison group. Nevertheless valuable results could be collected, some of which are similar to the results of existing literature. 21% of all participating dogs showed diarrhea during the two-week survey whereas also 21% vomitted during said period. In summary, 34% of the dogs were adversely affected by gastrointestinal disorders within two weeks . This high percentage coincides partially with the results of the previous rare literature. Because symptoms such as diarrhea and vomiting trouble most dog owners little in the first place and the symptoms are self-limiting in most cases, the affected dogs in these mild cases of diarrhea and vomiting are rarely presented to a veterinarian. For this reason, far too little is known about the frequency of these symptoms in healthy dogs, as most studies on diarrhea and vomiting on data stem from animal clinics and hence the most harmless cases of diarrhea and vomiting are not considered. The actual incidence of gastrointestinal disorders such as diarrhea and vomiting in healthy dogs could and should be an interesting aspect in the evaluation of diseases and in the evaluation of drug intolerance. For this reason, further research in this area would certainly be useful and desirable.