What is the problem with your vets not prescribing antibiotics when they themselves said your rabbit had a bacterial infection(pasteurella). Probiotics won't clear up a bacterial infection, this requires antibiotics.
Injectable penicillin is an option, but one injection isn't enough. If it's just the short acting procaine penicillin, that requires daily injections. If it's the long acting procaine/benzathine penicillin, that should be injected every 2-3 days. Which means you will need to be taught how to give the injections if you don't want to be at the vet several days a week for them to do it. And this is going to have to be done for probably 4 weeks minimum, maybe longer.
Then with penicillin, because any accidental oral ingestion of it could cause serious digestive disease, precautions need to be taken like if any leaks out at the injection site onto the fur, it needs to be carefully and immediately cleaned off so your rabbit doesn't lick it off. Also a high hay diet can possibly help minimize the risk of antibiotic induced enterotoxemia. And I would remove extra sugars and carbs from the diet as they encourage the wrong kind of bacterial growth in the digestive tract. And you want a very healthy digestive tract when giving this antibiotic. Even though it is given by injection, it can still sometimes lead to serious digestive problems occurring.
You may want to consider trying enrofloxacin or ciprofloxacin(pretty much the same as enrofloxacin) first if the vet is willing. They aren't always the most effective antibiotic for rabbits(depending), but in some cases it can be, is usually one of the safest antibiotics to give to rabbits, and it can be given orally, which would be a lot easier for you. It may be worth just asking your vet if they have either one of those as an oral medication, and if you could try one of those two antibiotics instead, and maybe pick it up today. The sooner the antibiotic is started the better. An oral suspension is the easiest way to give it(though rabbits usually detest the taste), I wouldn't let them do injectable enrofloxacin as it can sometimes cause sterile abscesses, and then there are pills as an option, but these you would have to mix up or hide in food to give to your rabbit. I crushed mine and mixed with maple syrup.
All you can really do is get the right medications started. The antibiotic, anti inflammatory meloxicam could be helpful, and if you have bisolvon to thin the mucous, that is sometimes prescribed in Europe. If the respiratory infection has advanced to increased respiratory effort and/or mouth breathing, then this is incredibly serious and needs emergency treatment.
Medirabbit (respiratory infections in rabbits)
Medirabbit (safe medications for rabbits)
http://wabbitwiki.com/wiki/Common_drug_dosages_for_rabbits
Injectable penicillin is an option, but one injection isn't enough. If it's just the short acting procaine penicillin, that requires daily injections. If it's the long acting procaine/benzathine penicillin, that should be injected every 2-3 days. Which means you will need to be taught how to give the injections if you don't want to be at the vet several days a week for them to do it. And this is going to have to be done for probably 4 weeks minimum, maybe longer.
Then with penicillin, because any accidental oral ingestion of it could cause serious digestive disease, precautions need to be taken like if any leaks out at the injection site onto the fur, it needs to be carefully and immediately cleaned off so your rabbit doesn't lick it off. Also a high hay diet can possibly help minimize the risk of antibiotic induced enterotoxemia. And I would remove extra sugars and carbs from the diet as they encourage the wrong kind of bacterial growth in the digestive tract. And you want a very healthy digestive tract when giving this antibiotic. Even though it is given by injection, it can still sometimes lead to serious digestive problems occurring.
You may want to consider trying enrofloxacin or ciprofloxacin(pretty much the same as enrofloxacin) first if the vet is willing. They aren't always the most effective antibiotic for rabbits(depending), but in some cases it can be, is usually one of the safest antibiotics to give to rabbits, and it can be given orally, which would be a lot easier for you. It may be worth just asking your vet if they have either one of those as an oral medication, and if you could try one of those two antibiotics instead, and maybe pick it up today. The sooner the antibiotic is started the better. An oral suspension is the easiest way to give it(though rabbits usually detest the taste), I wouldn't let them do injectable enrofloxacin as it can sometimes cause sterile abscesses, and then there are pills as an option, but these you would have to mix up or hide in food to give to your rabbit. I crushed mine and mixed with maple syrup.
All you can really do is get the right medications started. The antibiotic, anti inflammatory meloxicam could be helpful, and if you have bisolvon to thin the mucous, that is sometimes prescribed in Europe. If the respiratory infection has advanced to increased respiratory effort and/or mouth breathing, then this is incredibly serious and needs emergency treatment.
Medirabbit (respiratory infections in rabbits)
Medirabbit (safe medications for rabbits)
http://wabbitwiki.com/wiki/Common_drug_dosages_for_rabbits