Good Morning and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
I am so sorry to hear about Flower's condition...
There is possibility that there is part of a quill that is still inside or that there is an infection caused by the quills. The best thing you can do for Flower over the weekend is to apply hat compresses to this area every 4-6 hrs to help draw out any infection and/or piece of a broken off quill.
Also, give Flower aspirin at 5 mg per pound of her weight every 12 hrs to decrease the pain and inflammation. If she is still hurting by Monday, you will have to have your vet examine Flower since , if there is a piece of quill embedded in the paw, they will have to find and remove it under anesthesia.
In most cases, the infection is causing this and this treatment will be curative.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please REPLY so I can clarify for you.
Sincerely, ***** *****