DiscussionWe included 25 dogs, but 9 dogs dropped-out from this study. The main reason why they didn’t finish the study was owners could not make their dogs recheck on time, and 3 dogs were did euthanasia after only 1 or 2 session of acupuncture or electroacupuncture. The neurological dysfunction due to IVDD is usually not improving in a short time by acupuncture or electroacupuncture, especially when the grade is high. Therefore, some owners would give up the treatments and did euthanasia for their dogs based on humanitarian and compassionate considerations to relieve suffering. If we could include more dogs with IVDD in grade 1 to 5, we could compare the effectiveness of acupuncture and electroacupuncture in low and high grade respectively. However, only 16 dogs completed the treatments in this study, so we could not divide the dogs into high grade or low grade group to compare the differences in recovery time and successful rate of acupuncture and electroacupuncture.In this study, 10 dogs were classified as dysfunction grade 1 and 2, which was considered to be low grade group. And 6 dogs were classified as grade 3 and 4, which was considered to be high grade group. The recovery time (Mean ± SD) was 11.0 ± 6.78 days (range, 5 to 23 days) and 30.2 ± 12.80 days (range, 10 to 42 days) in low and high grade groups respectively. It shows that dogs with grade 1 and 2 could recover in a significantly (p