by Ian Tullis, Wei-Hwa Huang
The puzzle text nudges you to look for animals which are sports teams of Ivy League schools.
In the Jack and the Beanstalk story, the giant yells FEE FI FO FUM. The "feeder" answers here are these words with some letters appended. The appended letters form the answer.
Taking the unused letters spells ???RELLISES. The answer is TRELLISES, and that means that the Tiger answer must be FEET.