First of all is the medication that he gave you to givean injection or is it oral?
It really is important to know what you are giving him .
Is there anyway you could call the office and get the receptionist to give you the name and dosage of the medication.? You could say that a friend's bunny was treated for an abscess and she wanted to know what the treatment for your rabbit is.
i don't know why he would want to stop it for over the weekend except he may not have used it a lot before and is a little concerned about side-effects.
Without knowing what the drug is there is not much we can help you with that now.
I also wonder whether your vets would be willing to talk to Randy who is not a vet but a wild-life rehabber who works with cutting edge vets in a rabbit rescue in North Carolina. Randy is always willing to do consults with vets as he has had a lot of very positive experiences successfully treating rabbits with abscesses.
there is a member of the former named Bon whose rabbit just had surgery for an abscess. i believe that Bon's bunny was getting penicillin G and possibly azithromycin .
You may want to pm her as she has spoken to randy also and i feel that she believes that she has received adequate care for her rabbit. She also lives in the UK and did not have access to bicillin.
is your rabbit eating, drinking and behaving normally?
Did the vet give you a probiotic to give your bun in addition to the antibiotic?
i would not panic over whether these are the right vets to go to yet. Most of us have to feel are way along as things occur.
what you need to do is have a back up plan..
stick with this vet for now but also try to get some leads on other vets that you can get to that may possibly meet dexter's need better. (if you need it in the future0
You have to be the manager of the situation. learn as much as you can about abscesses and during the learning process you will find that your knowledge will make you go one direction or another.
it takes time and is a lot of work but in the end dexter will benefit and you will become even more of a rabbit saavy owner.