Picture of Andrew Allen

Andrew Allen Professor, Department of Veterinary Pathology

Research Area(s)

  • Clinically oriented and diagnostic anatomic pathology

Academic Credentials

  • DVM, University of Saskatchewan, 1987
  • MVetSc, University of Saskatchewan, 1992
  • PhD, University of Saskatchewan, 1997

Research Interests

Dr. Allen's research focuses on clinically oriented and diagnostic anatomic pathology. He uses gross postmortem examinations, histopathology, ancillary diagnostic tests, fundamental epidemiological techniques, and experiments to investigate naturally occurring diseases of domestic animals. He has been investigating congenital hypothyroidism of foals for many years.


* Indicates the lead or main or corresponding author 

Names in bold indicate Andrew Allen as well as any undergraduate student or any graduate student being supervised and serving as a collaborator / coauthor 


F.J. Guardado, K. Gabadage, A.L. Allen*.  Presumptive metastatic leiomyosarcoma in a feedlot steer.  Canadian Veterinary Journal, accepted, April 6, 2022. 

Pimentel, A.L. Allen, J.L. Carmalt*.  Developmental Orthopedic Disease and Early Osteoarthritis of the Temporomandibular Joint in a 15-Month-Old Quarter Horse Filly.  Equine Veterinary Education, published online November 7, 2021.

 M.D. Meachem*, A.L. Allen.  What Is Your Diagnosis? Caudal Abdominal Mass in a Cat (disseminated intra-abdominal dermatophytic pseduomycetoma caused by Microsporum canisis).  Veterinary Clinical Pathology, published online February 14, 2022. 


Cotter*, L.A. Zwicker, J. Lavallee, U.G. Perdrizet, A.L. Allen, S. Sukut, B. Matz.  Bronchocutaneous Fistula in a Dog.  Journal of Small Animal Practice, 63, 336.

Jose, A.L. Allen, B. Blakley, A. Al-Dissi*.  Evaluation of Metallothionein and Ki-67 Expression in Chronic Cholangiohepatitis in Cats, 2021.  Canadian Journal of Veterinary Research, 85, 36-44.  

D.E.E. Abbott, A.L. Allen*.  Canine Eosinophilic Pulmonary Granulomatosis: A Case Report and Literature Review, 2020.  Journal of Veterinary Diagnostic Investigation, 32, 329-335. 

T.T. Smyth, A.L. Allen, J.L. Carmalt*, 2019.  Histologic Assessment of Age-Related Changes in the Temporomandibular Joints of Horses.  American Journal of Veterinary Research, 80, 1107-1113. 

K.P. Carmalt, J.L Carmalt, K. Henderson, A.L. Allen, D.G. Wilson, 2019.  Novel Technique for Prevention of Rotation of the Distal Phalanx Relative to the Hoof Wall in Horses with Acute Laminitis.  American Journal of Veterinary Research, 80, 943-949. 

J.N.C. Verhoef, A.L. Allen, J.C.S. Harding, A.N. Al-Dissi*, 2018.  Metallothionein Expression in Horses with Chronic Liver Disease and Its Correlation with Ki-67 Immunoreactivity.  Veterinary Pathology, 55, 703-710. 

J.L. Carmalt*, S. Mortazavi, R.C. McOnie, A.L. Allen, S. Unniappan, (2018, January 8). Profiles of Pro-Opiomelanocortin and Encoded Peptides and Their Processing Enzymes in Equine Pituitary Pars Intermedia Dysfunction. PLOS ONE, 13, e0190796, https://doi.org/10.1371/journal.pone.0190796 (11 pages). 

J.L. Carmalt*, C.L. Waldner, A.L. Allen, 2017.  Equine Pituitary Pars Intermedia Dysfunction: An International Survey of Veterinarians’ Approach to Diagnosis, Management and Estimated Prevalence. Canadian Journal of Veterinary Research, 81, 261-269. 

T.T. Smyth, A.L. Allen, J.L. Carmalt*, 2017.  Clinically Significant, Non-Traumatic Degenerative Joint Disease of the Temporomandibular Joints in a Horse.  Equine Veterinary Education, 29, 72-77. 

C.R. Davis*, B.A. Valentine, E Gordon, S.P. McDonough, P.A. Schaffer, A.L. Allen, P Pesavento, 2016.  Neoplasia in 125 North American Donkeys (Equus asinus):  Literature Review and a Survey of Five Veterinary Schools in the United States and Canada. Journal of Veterinary Diagnostic Investigation, 28, 662-670.

E. Tourigny*, R. Thomas, E. Guiry, R. Earp, A. Allen, J.L. Rothenburger, D. Lawler, M. Nussbaumer, 2016.  An Osteobiography of a 19th-Century Dog from Toronto, Canada.  International Journal of Osteoarchaeology, 26, 818-829.