57629
Failure to control breeding of pet cats by spaying and neutering , as well as abandonment of pets , resulted in large numbers of feral cats worldwide , contributing to the extinction of entire bird , mammal , and reptile species , and evoking population control .
 pet
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 pet