why does grandfather take toto to saharanpur and how why does the ticket collector insist on calling toto a dog

Grandfather takes Toto to Saharanpur because Toto, the mischievous monkey, does not allow the other pets in the household to sleep at night. To provide relief to the other animals and manage Toto, Grandfather decides to take him along on a trip to Saharanpur in a big black canvas kit-bag that keeps Toto secure and prevents him from escaping or bothering others during the journey. The ticket collector insists on calling Toto a dog because, according to railway rules, there is no separate category or fare for monkeys. The collector categorizes Toto as a dog to charge a fare for him, as dogs are the only animals explicitly covered under the rules for travel tickets. This practical classification is done to abide by the rules and charge the appropriate fare since there is no specific rule for monkeys on the train. Thus, Toto is taken to Saharanpur to manage his nuisance at home, and he is designated a dog by the ticket collector to comply with railway fare regulations.