Age determination in dog puppies by teeth examination: legal, health and welfare implications, review of the literature and practical considerations
DOI:
https://doi.org/10.12834/VetIt.1876.9968.2Keywords:
Age determination, Dog, Forensic medicine, Puppy trade, Teeth examination, Veterinary legislationAbstract
Age determination of puppies represents a significant issue of animal welfare and forensic medicine, particularly for what concerns trade and imports of dogs. Despite the movement of puppy dogs before the age of 15 weeks is forbidden by Regulation (EU) No 576/2013, the occurrence of illegal transport of younger puppies is not uncommon. The illegal trade of puppies increases instances of falsified documentation, the counterfeit of vaccine certificates and discrepancies between the declared age and the real age of the puppies. Consequently, determining the exact age of animals and evaluating their welfare become legally crucial. Dental examination currently represents the most common approach to estimate the age of a puppy in clinical practice and in forensic investigations. In this work we addressed the legal, health and welfare issues associated with dogs’ trade and import and we reviewed the existing literature referring to the assessment of age in dogs by dental examination. The imprecision and inaccuracy of this method make it poorly convincing in legal proceedings. The reasons for such vagueness are to be ascribed both to the lack of standardization and to many variability factors (size, breed, sex, diet, etc.) which influence dental eruption and development.
References
Akers R.M. & Denbow D.M. 2008. Teeth. In Anatomy and physiology of domestic animals. Blackwell Publishing, 443-445.
Arena L., Messori S., Ferri N. & Ruggieri E. 2015. Introduzione di cuccioli dall’estero. 30 Giorni, 5, 25-28.
Arnall L. 1960. Some Aspects of dental development in the dog - II. Eruption and Extrusion. J Small Anim Pract, 1, 259-267.
Balasini D. 1995. L’età nel cane. In Zoognostica: per la conoscenza, la valutazione e la Scelta degli animali. Edagricole, Bologna, 316-321.
Barone R. 1981. Denti dei carnivori. In Anatomia comparata dei mammiferi domestici. Edagricole, Bologna, 164-172.
Barton A. 1939. Age determination in dogs. Iowa State Univ Vet, 2, 18-19.
Benini R. 2008. Il commercio dei cuccioli dall’est Europa. 30 Giorni, 2, 9-11.
Bonetti F. 1995. I denti del cane. In Zoognostica del cane. Editrice San Giorgio, Bologna, 259-268.
Bourdelle E. & Bressou C. 1953. Anatomie regionale des animaux domestiques. Baillière et fils, Paris.
Cornevin C. & Lesbre F.X. 1894. Des dents et de la connaissance de l’age du chien. In Traité de l’age des Animaux Domestiques d’apres les Dents et les productions epidermiques. Baillière et fils, Paris, 390-427.
Dyce K., Sack W.O. & Wensing C.J.G. 2018. The dentition. In Dyce, Sack, and Wensing’s Textbook of Veterinary Anatomy. Elsevier Saunders, St. Louis, Missouri, 369-372.
Evans H. & de Lahunta A. 2013. The digestive apparatusand abdomen. In Miller’s anatomy of the dog. Elsevier Saunders, St. Louis, Missouri, 281-337.
Ferrara B. 1965. Determinazione dell’età del cane. InLa determinazione dell’età negli animali. Edizioni Scientifiche Italiane, Napoli, 192-205.FOUR PAWS International 2013. Puppy trade in Europe: research on the impact of illegal businesses on the market, on consumers, on the one-health concept and on animal welfare. http://www.vier-pfoten.bg/files/EPO/Materials_conf/Puppy_Trade_in_Europe/REPORT_EUROPEAN_PUPPY_TRADE.pdf (Accessed on 02/05/2019).
Fulton A.J., Fiani N. & Verstraete F.J.M. 2014. Canine pediatric dentistry. Vet Clin North Am Small Anim Pract, 44, 303-324.
Gesierich K., Failing K. & Neiger R. 2015. Age determination in dogs using ocular light reflection, dental abrasion and tartar. Tierarztl Prax Ausg K Klientiere Heimtiere, 43, 317-322.
Girard N.F. 1845. Età del cane. In Ippodonteologia. Perelli e Mariani, Milano, 182-196.
Gorrel C. 2013. Anatomy of the teeth and periodontium. In Veterinary dentistry for the general practitioner. Saunders, Edinburgh, 37-41.
Hale F.A. 2005. Juvenile veterinary dentistry. Vet Clin North Am Small Anim Pract, 35, 789-817.
Hare W.C. 1959. Radiographic anatomy of the canine pectoral limb. II. Developing limb. J Am Vet Med Assoc, 135, 305-310.
Hare W.C. 1960. Radiographic anatomy of the canine pelvic limb. Part I. Fully developed limb. J Am Vet Med Assoc, 136, 542-549.
Harvey C.E. & Emily P.P. 1993. Teeth. In Small Animal Dentistry. Mosby Elsevier, St. Louis, Missouri, 5-11.
Hoskins J. 2001. Dental disease and care. In Veterinary pediatrics: dogs and cats from birth to six months. Saunders, Philadelphia, 135-146.
Huidekoper R.S. 1891. Age of the domestic animals. The Medical Bulletin Printing House, Philadelphia.
Kershaw K., Allen L., Lisle A. & Withers K. 2005. Determining the age of adult wild dogs (Canis lupus dingo, C. l. domesticus and their hybrids). I. Pulp cavity: tooth width ratios. Wildl Res, 32, 581-585.
Kremenak C.R. 1969. Dental eruption chronology in dogs: deciduous tooth gingival emergence. J Dent Res, 48, 1177-1184.
Langley R.L. 2009. Human fatalities resulting from dog attacks in the United States, 1979-2005. Wilderness Environ Med, 20, 19-25.
Liautard A. 1885. How to tell the age of the domestic animals. William R. Jenkins, New York.
Liebich H.G., König H.E. & Aurich C. 2014. Dentition of the dog. In Veterinary anatomy of domestic mammals: textbook and colour atlas. Schattauer, New York, 323-324.
Lobprise H.B. 2012. Blackwell’s five-minute veterinary consult clinical companion: small animal dentistry, 2nd ed. Wiley-Blackwell, Ames.
Mbizah M.M., Steenkamp G. & Groom R.J. 2016. Evaluation of the applicability of different age determination methods for estimating age of the endangered African wild dog (Lycaon Pictus). PLoS ONE, 11 (10), e0164676.
Mellanby M. 1929. Diet and the teeth: an experimental study. Part I. Dental structure in dogs. Medical Research Council, Special Report Series, No 140, London.
Méndez Gallart R., Gómez Tellado M., Somoza Argibay I., Liras Muñoz J., Pais Piñeiro E. & Vela Nieto D. 2002. Dog bite-related injuries treated in a pediatric surgery department: analysis of 654 cases in 10 years. An Esp Pediatr, 56, 425-429.
Miller M.E. 1952. Guide to the dissection of the dog, 3rd ed. Ithaca, New York.
Nickel R., Schummer A. & Seiferle E. 1979. Denti e dentatura dei carnivori. In Trattato di anatomia degli animali domestici. Ambrosiana, Milano, 82-87.
Overall K.L. & Love M. 2001. Dog bites to humans: demography, epidemiology, injury, and risk. J Am Vet Med Assoc, 218, 1923-1934.
Pierantoni L., Albertini M. & Pirrone F. 2011. Prevalence of owner-reported behaviours in dogs separated from the litter at two different ages. Vet Rec, 169, 468-468.
Piérard J. 1967. Note on applied anatomy: determination of the age of dogs. Can Vet J, 8, 197-200.
Reece W.O. 2009. Teeth. In Functional anatomy and physiology of domestic animals. Wiley-Blackwell, Ames, 361-363.
Reisner I.R., Erb H.N. & Houpt K.A. 1994. Risk factors for behavior-related euthanasia among dominant-aggressive dogs: 110 cases (1989-1992). J Am Vet Med Assoc, 205, 855-863.
Rosado B., García-Belenguer S., León M. & Palacio J. 2009. A comprehensive study of dog bites in Spain, 1995-2004. Vet J, 179, 383-391.
Sacks J.J., Kresnow M. & Houston B. 1996. Dog bites: how big a problem? Inj Prev, 2, 52-54.
Seoudi K. 1947. X-ray examination of epiphyseal union as an aid to the estimation of the age in dogs. Br Vet J, 103, 150-155.
Serpell J. & Jagoe J.A. 1995. Early experience and the development of behaviour. In The domestic dog: its evolution, behaviour and interactions with people. Cambridge University Press, Cambridge, 79-102.
Shabestari L., Taylor G.N. & Angus W. 1967. Dental eruption pattern of the beagle. J Dent Res, 46, 276-278.
Silver I.A. 1963. The ageing of domestic animals. In Science in archaeology. Basic Books Inc., New York, 250-268.
Sisson S. & Daniels Grossman J. 1982. Denti. In Anatomia degli animali domestici di Sisson and Grossman. Piccin, Padova, 1608-1615.
Slabbert J.M. & Rasa O.A. 1993. The effect of early separation from the mother on pups in bonding to humans and pup health. J S Afr Vet Assoc, 64, 4-8.
Squarzoni P. 2003. Eruzione dei denti decidui e permanenti. In Odontostomatologia del cane e del gatto. Poletto, Gaggiano, 18.
Sumner‐Smith G. 1966. Observations on epiphyseal fusion of the canine appendicular skeleton. J Small Anim Pract, 7, 303-311.
Thrall D. & Robertson I. 2015. Atlas of normal radiographic anatomy and anatomic variants in the dog and cat, 2nd ed. Elsevier Saunders, St. Louis.
Tobias G., Tobias T.A. & Abood S.K. 2000. Estimating age in dogs and cats using ocular lens examination. Compend Contin Educ, 12, 1085-1091.
Vaissaire J.P. 2001. I denti del cane. In Enciclopedia del cane. Aniwa Publishing, Paris, 142-143.
Van de Wetering A. 2011. Dental and oral cavity. In Small animal pediatrics: the first 12 months of life. Elsevier Saunders, St. Louis, 340-350.
Van Lancker S., Van Den Berge K., Van Den Broeck W. & Simoens P. 2005. Counting cementum growth lines in dogs (Canis familiaris) and red foxes (Vulpes vulpes) as a means of age determination. Vlaams Diergeneeskd Tijdschr, 74, 288-293.
Veggetti A. & Falaschini A. 2009. Età del cane. In Anatomia, fisiologia, zoognostica. Edagricole scolastica, Milano, 315.Veronesi M.C., Castagnetti C. & Taverne M.A.M. 2013. Apparato digerente. In Neonatologia veterinaria. EdiSES, Napoli, 15-16.
