I don't know what to revise the sentence with but I'll try.
How about this...
"The squirrel ran in circles around the tree and chattered angrily at the curious cat."
The words "around" and "circumference" mean the same thing so using both of them is redundant. You can take one out.
The word "who" I think can be taken out. That word is referencing to that specific squirrel but if we just state the "squirrel ran in circles..." can we not assume that it's the same squirrel?
