Microchip implants migrate often. This removes the main benefit, quick identification in the veterinary surgery or animal shelter. The theoretical capacity to see more dogs an hour means veterinary surgeons and animal shelter workers love microchip implants, more dogs in less time means more money or more effective use of volunteer’s time. But a collar and tag is much quicker if a microchip migrated down the leg or back.
Migration of implants causes discomfort for animals. A commonly listed problem on dog forums, addressing migration should be top of the list for manufacturers and major implanters. Instead of highlighting this obvious problem animal welfare groups and company sponsored veterinary surgeons ignore it. Asking Government to mandate a market for sponsors instead of demanding sponsors fix this problem with their product. Yet leaving an animal with a glass shard in its leg would be grounds for cruelty if owners did it because it causes unnecessary suffering. It is fine to implant an unnecessary device that migrates to the same spot, is the same size and causes the same pain. The flawed logic is obvious here.
- Delayed spinal cord injury following microchip placement in a dog. Joslyn SK, Witte PG, Scott HW. University of Glasgow, Small Animal Hospital, 464 Bearsden Road, Glasgow, Lanarkshire G61 1QH, UK, Vet Comp Orthop Traumatol. 2010;23(3):214-7. Epub 2010 Apr 26. http://www.ncbi.nlm.nih.gov/pubmed/20422127
- MICROCHIP IMPLANT MANUAL Cats / Dogs Spring 2006: "Microchips that have been incorrectly implanted in the scruff are likely to migrate around the neck and onto the front of the shoulders or chest. Chips wrongly implanted over the side of either shoulder (instead of in-between) are likely to migrate down either respective leg, so it is important that these areas are thoroughly checked." Page 4 http://www.bsava.com/LinkClick.aspx?fileticket=PzCDP1Ffcpw%3d&tabid=154&mid=302
- Microchip Migration: British Dalmatian Club Forum Index - General Chat http://www.britishdalmatianclub.org.uk/forum/viewtopic.php?p=8633&sid=616bedbbf871626393fcbc8d52464d2a
- Zero's microchip has moved to his back leg - Dogz Online Forums - Discussion Forums - General Dog Discussion http://www.dolforums.com.au/index.php?showtopic=140293&st=15
- Cavalier Chat - General cavalier chat & discussion - Anyone had a microchip migrate? http://www.cavaliertalk.com/forums/showthread.php?16857-Anyone-had-a-microchip-migrate&s=7946523f3d437af80be42b69161d86e2
- Surgical removal of a microchip from a puppy's spinal canal.Smith TJ, Fitzpatrick N.Fitzpatrick Referrals, Halfway Lane, Eashing, Surrey GU7 2QQ, UK. Vet Comp Orthop Traumatol. 2009;22(1):63-5. Tibetan Terrier was admitted with a 12-hours history of acute onset of progressive tetraparesis following insertion of a microchip to the dorsal cervical region. http://www.ncbi.nlm.nih.gov/pubmed/19151873
- Spinal cord injury resulting from incorrect microchip placement in a cat. Platt S, Wieczorek L, Dennis R, De Stefani A. Centre for Small Animal Studies, Animal Health Trust, Newmarket, Suffolk CB8 7UU, UK. J Feline Med Surg. 2007 Apr;9(2):157-60. Epub 2006 Sep 18. http://www.ncbi.nlm.nih.gov/pubmed/16982206