If it's not bothering her, then I'd wait till Monday to take her to your regular vet. No reason to spend all the extra money on a sunday to see the er vet if she is acting fine. The bump doesn't seem very big to me at all, but you know your Rox best. If it were me, I'd wait till Monday and just pay the $35 office visit for peace of mind, but I wouldn't be rushing to the er just yet. Hope everything will be fine!
