Jan's allergies are acting up, and Alice fears it might be Mike or one of the boys, but when it seems that Jan is allergic to Tiger, the family fear they might have to lose their pet dog.
Carol decides to keep Jan home from school because of her excessive sneezing, which she believes could be the sign of something like the flu. But once Jan gets into bed, she stops sneezing. Carol, Alice and the doctor surmise that Jan has probably developed an allergy to something. After checking many of the regular causes of allergies such as pollen, they fear that Jan is allergic to a person, namely Mike, because Jan starts sneezing as soon as he comes home.
Their concern is bittersweet when Jan continues to sneeze even when Mike isn't around, but does so when Tiger is, leading them to believe that he is the cause of her allergic reaction. They know that they have to get rid of Tiger for Jan's sake, news which will probably hit the boys the hardest as they raised Tiger from a pup. Individually, each of the family members, without telling anyone else, believes they have the answer to the problem without needing to get rid of Tiger, but which makes for an extremely agitated dog!
- The original dog actor playing Tiger died whilst this episode was in production, after being hit by a florist truck.