98692
Selectively bred for their small size , smaller dog breeds like the Chihuahua ( average lifespan of 15 – 20 years ) have the B / B genotype for the IGF-1 haplotype , reducing the amount of IGF-1 produced .
 Chihuahua
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:
 Chihuahua