Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: A puppy born without his front legs is on the move, thanks to his 3-D printed wheelchair. Tumbles, a six-week-old Terrier mix, was fitted with the prototype wheelchair last week, which was printed in 14 hours by the Ohio University Innovation Center, according to ABC News. 'He gets around really good. He's now starting to hop. He does that when he gets excited,' said Karen Pilcher, Tumbles' foster mother and the rescue coordinator at Friends of the Shelter Dogs in Athens, Ohio. Tumbles, who was the runt of three puppies born in October, had trouble nursing and was rescued when he was two weeks old.Tumbles, a six-week-old Terrier mix, was born without his front legsHis two-wheeled cart was printed in 14 hours by Ohio University Innovation Center's 3-D printerTumbles will have a fitting in an updated version of wheelchair this weekHe is being looked after at an animal shelter and will be put up for adoption when he is older 
 Question:The shelter decided to take _ in after deciding that he would not be able to make it through the cold outdoor temperatures or feed properly among the other puppies in the litter, according to 3ders.org.

Tumbles