In a spinal the medication is delivered closer to the spinal cord which allows immediate pain relief, but eventually does wear off. (sciencedaily.com)
In fact, many pets experience immediate pain relief, even after only one session. (bracpet.com)
Acupuncture — Acupuncture provides immediate pain relief by causing the release of endorphin's into the blood stream of your pet. (sarasotaanimalmedical.com)