Answer:
Taking care of her brother Raymond changes Squeaky because she doesn't want anyone to hurt his feelings. Squeaky likes to be a winner and who can blame her. She wants to beat everyone in the big race because she works hard to be the most fastest runner around.
Step-by-step explanation:
It's a bit funny, but Squeaky stays focused on her run. Then Squeaky looks the other direction and sees Raymond. When she sees him, Squeaky is shocked by what she sees.
Hope that helped.