Here's the response received after asking Horse Health of the difference in theirs and pharmaceutical pine tar.
I guess any rat hairs or roach feet are not purposely added. Good enough.
Dear Mr. xxx,
Thank you for your email. We always appreciate hearing from our customers.
Our pine tar is 100% pine tar. There are no fillers, no additional chemicals, it is just 100% pine tar. I can not compare to other companies products, but our is not a prescription.
If you have further questions, please contact us back.
Gretchen
Pine Tar Consumer & Professional Support
I guess any rat hairs or roach feet are not purposely added. Good enough.