The cause of gastrointestinal problems for dogs is often related to their tendency to eat things they shouldn't, while cats may suffer digestive system upset as a result of parasites in their prey. For cats and dogs, studies show that a healthy population of gut bacteria is vital to a fit gastrointestinal tract.
In the simplest box plot the central rectangle spans the first quartile to the third quartile (the interquartile range or IQR). A segment inside the rectangle shows the median and whiskers above and below the box show the locations of the minimum and maximum.he box plot (a.k.a. box and whisker diagram) is a standardized way of displaying the distribution of data based on the five number summary: minimum, first quartile, median, third quartile, and maximum.
For the data set in this box plot: 1  lower (first) quartile Q1 = 7. 2  median (second quartile) Q2 = 8.5. 3  upper (third) quartile Q3 = 9. 4  interquartile range, IQR = Q3 - Q1 = 2. 5  lower 1.5*IQR whisker = Q1 - 1.5 * IQR = 7 - 3 = 4. 6  upper 1.5*IQR whisker = Q3 + 1.5 * IQR = 9 + 3 = 12.