Hello, I'm Dr. Kara. I have over 20 years of experience as a veterinarian and I'd like to help with your concerns about Jack's foot and his not bearing any weight on it.
I agree that there should be concern because he still isn't bearing any weight on his foot. By now with antibiotic therapy I would expect him to be healing and at least trying to bear some weight on it.
Was he bearing weight on it initially and then stopped or has he been off that foot since the bite?
Do you think his toe is more or less swollen then it was initially?
Is he reacting painfully to you manipulating his toe now?
Were any radiographs of his foot taken?
Have you been enforcing strict rest so he doesn't overdo on that foot?
It is possible that he had so much adrenalin from the attack that initially he didn't react to manipulation, and if there wasn't much displacement a fracture could have been hard to diagnose initially. But because he's still not bearing weight on his foot I do believe another examination is needed and probably radiographs should be taken
It is also possible that he has sustained tendon or ligament damage that was initially a partial tear and is now a complete one making the foot feel unstable. Radiographs won't show soft tissue injuries like tendons or ligaments, but if his conformation is abnormal on radiographs and/or his flexion and extension aren't right that will help diagnose that.
I don't think that you have to rush him into emergency but keep him confined and have him checked early this week.
Please let me know if you have any further questions.