How many dalmatian puppies are in pongo and perdita’s litter?

 Litter is the birth of multiple offspring at one time. The number of puppies in a litter often varies with the size of the dog, bigger dogs give birth to more puppies than smaller dogs. Pongo and Perdita are the parents in the story of 101Dalmatians. There are 15 puppies in Pongo and Perdita's litter. These dogs are later kidnapped and Pongo and Perdita start searching them.

15 puppies

Explanation:
First, let's define the term "Litter"
Litter is defined as multiple animals that are born at the same time from the same mother.

In Pongo and Perdita, they had a litter of 15 small puppies. The maid announced that only 14 survived, however, Roger was able to bring back the 15th puppy to life by performing cardiac message on it.

Later in the novel, these puppies are kidnapped and the journey of of Pongo and Perdita to save them begins.

Hope this helps :)