Splice the following two sentences together to form a single sentence that reads grammatically correct:
"I saw many birds." "A few people were walking their dogs."
I saw many birds while a few people were walking their dogs.
Complete the following task based on the instruction and optional input provided.### Instruction:
Splice the following two sentences together to form a single sentence that reads grammatically correct:

### Input:
"I saw many birds." "A few people were walking their dogs."

### Output:
I saw many birds while a few people were walking their dogs.