My little dwarf had a lump under his chin recently
We took him to a vet that we knew, knew something about rabbits (sadly, a lot in Australia don't, probably because of Australia's stupid hatred for the rabbit) but sadly, the person who was training in rabbits / reptiles had recently been pouched by one of the universities :-(
They did however direct us to one vet here that is a rabbit specialist (they trained the pouched vet we wanted to see in our local area)
The lump had got fairly large - like the OP of this thread, I don't know how I didn't see it before - he is regularly held (much to his dislike)
Anyhow, x-rays were taken because our little fellow had broken two top teeth as well, I suspect he had been fighting and run into something out in his outside enclosure where we release them when possible for a day of outside frolicking! He being the smallest has been very aggressive towards the largest of the rabbits, who has a wonderful nature and pretty much ignores him but will at times chase him away. We now have 3 rabbits (all male) who are released together but thankfully have decided chasing one another to mount one another is about as aggressive as they can be bothered to be now. Even our little aggressive drawf just tries to play mount-fog (take on leap-frog) with the largest mini-rex whom he used to nip and fight with. After a session of this they all lay down next to each other to cool off
If ever I thought they were aggressive to the point of harm, I'd separate them but they seem to have learnt to just get along fairly well instead. It was actually the introduction of the third rabbit that made all the difference, he just skits away and has taught the dwarf aggressive rabbit to run and/or attempt to mount each other instead of just bite back immediately. It's taken a long time for him to learn a new response, when we got him, he was caged with two other rabbits that continually picked on him as well as a guinea pig who used to nip him - poor little guy!
Anyhow, back to the main story
He had two broken top teeth but it appears they were a result of an impact injury, not bad teeth issues
The bottom teeth were infected but x-rays showed that it had not got to the bone yet
$600 in vet bills and arms fill of medicines, we started our journey home again
The vet didn't want to touch the abyss as he said it was well walled off for now and would probably resolve itself. He did however want us to give our rabbit an injection of antibiotics each day as well as a pain killer as he said the poor little fella's mouth would be quite painful. The vet kept calling us each week to see how our bunny was going. They only wanted to operate on him and remove teeth if the infect couldn't be stopped from going to the bone
So for the next month I injected my little bunny every day :-( They are so pain tolerant it's amazing but I found myself apologizing to him each time I had to capture him and inject him
I then noticed that the lump went down and thought everything was ok but then it expanded in size, so I called up the vet fully expecting to have to bring my bunny in for an operation
His main concern was if the rabbit was still eating and what was his activity like. Our dwarf rabbit is a little guts but he's not overweight at all, he's just highly strung and always on the move
The vet said the lump can often grown and shrink and not to be surprised if one day I notice it was wet around it, where it had leaked or even burst!
Then about a week later, it burst! I picked him up in the morning and noticed a crusty white substance on his underchin. That's when I noticed the small slit in the lump (where the fur had actually fallen off). I gave it a gentle squeeze and the white pus oozed out - very gross looking. I did this very gently and over time until nothing more came out. I repeated this later on in the day and again the next morning but the last time, nothing at all came out. I was still giving him his daily antibiotic injection
The lump never grew back and there is no telling now where the lump was because the fur has grown back
. The only telltale sign is the skin is slightly loose in that area, having been stretched to accommodate the lump at its full size
I closely monitor his teeth and try and give him only hay and some pellets as a treat
I really thought the vet was ignoring the lump situation but it turns out he was 100% correct and he's pretty much more trained than most vets here in Australia when it comes to rabbits
For those in Australia wanting a good rabbit vet
Sydney:
http://www.davidvella.com.au/index.html
Melbourne: (I have not used them)
http://www.melbournerabbitclinic.com/wordpress/
If your wanting to set up a business in Australia around rabbits, look into rabbit accommodation / housing, because the situation here is woeful. If can also solve the rabbit insurance issue for us as well, it's simply not offered :-(