You're in Good Paws by Maureen Fergus
From Tundra Books:
When Leo arrives at the hospital, he is surprised to find it run by animals! A hilarious story featuring animals in human situations, perfect for fans of Zootopia and A Sick Day for Amos McGee.
Slightly distracted parents accidentally take their son, Leo, to the animal hospital to get his tonsils out.
Luckily, taking care of a human doesn’t ruffle any feathers among the hospital staff. The chicken at the admissions desk is welcoming, the bear orderly is friendly and wise Dr. Stan inspires tremendous confidence despite being a mouse. Is the plastic cone really necessary, though?
In this sweet and hilarious story, a child discovers that a trip to the hospital can be a positive experience–even when the hospital isn’t quite up to code . . .