Answer: In the story, Isaac initially believes it will be difficult to find a dog as perfect as Roscoe. However, at the end of the story, Isaac feels happy and excited about finding a new perfect dog.
Here's a step-by-step explanation:
1. At the beginning of the story, Isaac thinks Roscoe is a perfect dog. This suggests that Roscoe meets all of Isaac's expectations and is an ideal companion.
2. Because Roscoe is so perfect, Isaac assumes it will be challenging to find another dog that matches his qualities.
3. However, as the story progresses, Isaac's perspective changes. He begins to realize that there are other dogs out there who could also be perfect in their own ways.
4. By the end of the story, Isaac has found a new dog that he considers to be perfect. This indicates that he no longer believes that finding a perfect dog is difficult or impossible.
5. Isaac's happiness and excitement about finding a new perfect dog suggest that he has opened his mind to the possibility that there are many different types of perfect dogs, each with their own unique qualities.
In summary, Isaac's initial belief that finding a perfect dog would be hard changes as he discovers that there are other dogs that can be just as perfect in their own ways. At the end of the story, he feels excited and happy about finding a new perfect dog.