I've used Hartz monthly flea treatment for dogs. It's not safe but
it's effective. I use only up to a maximum of 4 drops on top of the
shoulder blades. It got rid of the fleas but also irritated the skin
leaving a red spot which healed.
If you have an indoor bunny you might just use a flea comb and wash
bunny with a baby shampoo as well as spray the whole house with flea
killer. People say you should not wash a bunny but it's not a problem
if you make sure you dry them completely.
>> Stay informed about: fleas!