Homeopathics are derived from plants, animals and minerals so, yes, there are animal sources used in homeopathic medicines. All homeopathic remedies are highly diluted until the physical properties are no longer measureable, leaving only the energetic essence from the original source. The good news is that homeopathics are sustainable, in the making of Apis (honey bee, used for bites and stings) my pharmacy can make thousands of remedies from the one honey bee.
If you are concerned about using some of the animal medicines I prescribe you, you can refrain from using these remedies. Our medicines are not tested on animals.