There are a number of things you might consider trying two capsules sprinkled over the food- Start with one then increase to two and then to three a day. Very effective. Non-toxic. another thing is a homeopathic called Apis 6x . ^x is the strength. They are available at health food stores and are used for absesses. One to three pellets( from your hands, etc and become ineffectived. ) No food or water for 60 minutes before and after treatment. Lastly, there is something called Barley Green- available froma health food store. it's the powdered juice of the leves of the barley plant. Mix according to direction and give it in the water dish as even by dropperful as much as the rabbit will take. Non-toxic. Very effective.