Valerie Parker


Professor - Clinical

Contact (614) 292-3551 Veterinary Medical Center
601 Vernon Tharp Street
Columbus, OH 43210
Map Link


Veterinary Clinical Sciences

Professional Training and experience

  • Residency (SAIM), Iowa State University
  • Residency (Nutrition), Tufts University

Research Interests

  • Gastrointestinal disease
  • Kidney disease
  • Vitamin D metabolism
  • Nutritional management of a variety of diseases



  • Cridge H, Parker VJ, Kathrani A. Nutritional management of pancreatitis and concurrent disease in dogs and cats. J Am Vet Med Assoc 2024.
  • Ehrlich ME, Rudinsky AJ, Chew DJ, Parker VJ. Ionized hypercalcemia resolves with nutritional modification in cats with idiopathic hypercalcemia (IHC) or chronic kidney disease (CKD). J Fel Med Surg 2024.
  • Sekhar M, Rudinsky AJ, Cashman C, Parker VJ, et al. Commercially available wearable health monitor in dogs is unreliable for tracking energy intake and expenditure. Am J Vet Res 2023;
  • King E, Pappano M, Lorbach S, Green E, Parker VJ, Schreeg ME. Severe polycystic liver disease in a cat. J Fel Med Surg Open Rep 2023. Accepted. 
  • Francillon WB, Winston JA, Schreeg ME, Lilly ML, Parker VJ, Rudinsky AJ. Clinician prescribing practices for managing canine idiopathic acute diarrhea are not evidence based. J Am Vet Med Assoc 2023;261:1853-1861.
  • Rowe JC, Winston JA, Parker VJ, McCool KE, Suchodolski JS, Lopez R, et al. Gut microbiota promoting propionic acid production accompanies diet-induced intentional weight loss in cats. Scientific Reports 2023; Under review.
  • Brusach K, Lorbach S, Quimby J… Parker VJ, Toribio R. Measurement of ghrelin as a marker of appetite dysregulation in cats with and without chronic kidney disease. Vet Sci 2023;10:464;
  • Hernandez B, Cohn LA, Backus RC, KuKanich K, Hanzlicek AS, Parker VJ,… Jaffey JA. Evaluation of serum 25-hydroxyvitamin D, c-reactive protein, and haptoglobin as biomarkers in dogs newly diagnosed with histoplasmosis. J Vet Intern Med 2023;
  • Brodlie H, Quimby J, Rudinsky AJ,… Parker VJ. Measuring 25-hydroxyvitamin D in cats: comparison of a whole-blood lateral-flow assay, 2 dried-blood-spot tests, and serum LC-MS/MS. J Vet Diag Invest 2023 Mar 10;10406387231158106. Doi: 10.1177/10406387231158106.
  • Parker VJ, Hill R. Nutritional management of cats and dogs with diabetes mellitus. Vet Clin North Am 2023; Feb 27;S0195-5616(23)00017-7.
  • Nealon NJ, Wood A, Rudinsky AJ, Klein H, Salerno M, Parker VJ,… Winston JA. Fecal identification markers impact the feline fecal microbiota. Frontiers in Vet Med 2023 Feb 8;10:1039931. Doi: 10.3389/fvets.2023.1039931.
  • Sahoo DK, Allenspach K, Mochel JP, Parker VJ, Rudinsky AJ, Winston JA,… Jergens AE. Synbiotic-IgY therapy modulates the mucosal microbiome and inflammatory indices in dogs with chronic inflammatory enteropathy: a randomized, double-blind, placebo-controlled study. Vet Sci 2023;10:25: published online 12/30/22.
  • Moreno AA, Parker VJ, Howard JP, Winston, JA, Rudinsky AJ. Dietary fiber benefits and clinical use in gastrointestinal disease in dogs and cats. J Am Vet Med Assoc 2022;260(S3):
  • Rudinsky AJ, Parker VJ, Laxalde J, et al. Randomized, controlled trial demonstrates nutritional management is superior to metronidazole for treatment of acute colitis in dogs. J Am Vet Med Assoc 2022;260(S3):
  • Kratzer G, Shepherd M, Delaney S, Winston JA, Rudinsky AJ, Parker VJ. Home-cooked diets cost more than commercially prepared dry kibble diets for dogs with chronic enteropathies. J Am Vet Med Assoc 2022;260(S3):
  • Miller M, Quimby J, Langston C, Ames M, Parker VJ. Effect of calcifediol supplementation on renin-angiotensin-aldosterone system mediators in dogs with chronic kidney disease. J Vet Intern Med 2022;
  • Parker VJ. Nutritional assessment: Practical recommendations for cat caregivers. Fel Pract 2022 (Fall):25-31.
  • Gibson JF, Parker VJ, Howard JP, Snell CM, Cross EW, Pagliughi LB, et al. Escherichia coli pathotype contamination in raw canine diets. Am J Vet Res 2022;83: doi: 10.2460/ajvr.21.10.0166.
  • Sliman M, Rudinsky AJ, Lumbrezer S, Winston JA, Parker VJ, Lorbach S, Howard J. Suspected primary spontaneous aysymptomatic pneumothorax in a cat. Case reports in veterinary medicine 2022; Article ID 2827118.
  • Hildebrant I, Rudinsky AJ, Parker VJ, Winston JA, Wood A, Evans S, Howard JP. Novel multicentric hepatic lymphoma with extrahepatic biliary obstruction associated with duodenal perforation in a cat. Case reports in veterinary medicine 2021;
  • Burns K, Cline M, Coe J, Downing R, Durzi T, Kanara E, Loenser H, Parker VJ. 2021 AAHA Nutritional management guidelines. J Am Anim Hosp Assoc 2021;57:153-178.
  • Parker VJ. Nutritional management of chronic kidney disease of dogs and cats. Vet Clin North Am 2021; 51:685-710.
  • Giralico L, Makii B, Pray B, Parker VJ. Acute hepatopathy and myxedema coma with severe 
    diffuse atherosclerosis in a dog. Case reports in veterinary medicine 2021:29: 6622767. doi: 10.1155/2021/6622767.
  • Howard J, Bertan J, Parker VJ, Winston J, Rudinsky A. Transanal Access Port (TrAAP) technique: The use of a single incision laparoscopic surgical port during canine colonoscopy (a cadaveric study). BMC Vet Res 2021;17:43.
  • Rayhel LH, Harjes LM, Aarnes T, Chew DJ, Quimby J, Fields K, Parker VJ, Langston CL, Lerche P, Byron JB, Rudinsky AJ. Short-term efficacy of epidural pain management in dogs undergoing routine cystoscopy. J Vet Intern Med 2021;35:980-986.
  • Metras BN, Holle MJ, Parker VJ, Miller MJ, Swanson KS. Assessment of commercial kefir products for label accuracy of microbial composition and quantity. JDS Communications 2020;98:skaa301. Doi: 10.1093/jas/skaa301.
  • Parker VJ, Rudinsky AJ, Beizaei A, Chew DJ. Effects of calcifediol supplementation on markers of chronic kidney disease – mineral bone disorder (CKD-MBD) in dogs with CKD. J Vet Intern Med 2020;
  • Miller MS, Rudinsky AJ, Klamer BG, Chew DJ, Parker VJ. Association between vitamin D metabolites, vitamin D binding protein, and proteinuria in dogs. J Vet Intern Med 2020;
  • Metras BN, Holle MJ, Parker VJ, Miller MJ, Swanson KS. Assessment of commercial companion animal kefir products for label accuracy of microbial composition and quantity. J Anim Sci 2020; 10.1093/jas/skaa301
  • Gordon DS, Rudinsky AJ, Guillaumin J, Parker VJ, Creighton KJ. Vitamin C in health and disease: A companion animal focus. Top Companion Anim Med 2020;39. 100432. 10.1016/j.tcam.2020.100432.
  • Rayhel LM, Quimby JM, Green EM, Parker VJ, Bai S. Inter- and intra-rater reliability in the cross-sectional area of feline lumbar epaxial musculature evaluated via abdominal CT scan. J Feline Med Surg 2019; doi: 10.1177/1098612X19880997.
  • Andres M, Hostnik E, Green E, Langston C, Parker VJ, Gilor C, Rudinsky AJ. Diagnostic utility of thoracic radiographs and abdominal ultrasound in canine immune-mediated hemolytic anemia. Can Vet J 2019;60:1065-1071.
  • Parker VJ, Klamer B, Fascetti AJ. Amino acid status of dogs with protein-losing nephropathy. J Vet Intern Med 2019;33:680-685.
  • Groth E, Lulich JP, Chew DJ, Parker VJ, Furrow E. Vitamin D metabolism in dogs with and without hypercalciuric calcium oxalate urolithiasis. J Vet Intern Med 2019;33:758-763.
  • Hostnik ET, Parker VJ, Cullen JM. Computed tomography of lobular dissecting hepatitis in a young Golden retriever. J Am Anim Hosp Assoc 2019;55:e55203. doi: 10.5326/JAAHA-MS-6867
  • Rudinsky AJ, Harjes LM, Byron J, Chew DJ, Toribio RE, Langston C, Parker VJ. Factors associated with survival in dogs with chronic kidney disease. J Vet Intern Med 2018;32:1977-1982.
  • Rudinsky AJ, Rowe JC, Parker VJ. Nutritional management of chronic enteropathies in dogs and cats. J Am Vet Med Assoc 2018;253:570-578.
  • Parker VJ. Vitamin D in canine health and disease. Vet Focus 2018;28:16-23.
  • Parker VJ. Chronic kidney disease screening and confirmation testing in cats. Today’s Vet Pract 2018;8:9-12.
  • McCool KE, Rudinsky AJ, Garabed R, Parker VJ, Herbert CO, Gilor C. The effect of diet, adiposity and weight loss on the secretion of incretin hormones in cats. Domestic Anim Endocrinology 2018;62:67-75.
  • Zitzer NC, Marsh AE, Burkhard MJ, Radin MJ, Wellman ML, Jugan M, Parker VJ. Parasitemia due to Sarcocystis neurona-like infection in a clinically ill domestic cat. Vet Clin Path 2017;46:536-532.
  • Parker VJ, Rudinsky AJ, Chew DJ. Timely topics in nutrition: Vitamin D metabolism in canine and feline medicine. J Am Vet Med Assoc 2017;250:1259-1269.
  • Harjes LM, Parker VJ, Dembek K, Chew DJ, Toribio RE. Fibroblast growth factor-23 in canine chronic kidney disease. J Vet Intern Med 2017;31:784-790.
  • Parker VJ, Harjes LM, Dembek K, Young G, Chew DJ, Toribio RE. Relationship between the vitamin D metabolite – parathyroid hormone-fibroblast growth factor-23 axis in canine chronic kidney disease. J Vet Intern Med 2017;31:791-798.
  • Jugan MC, Rudinsky AJ, Parker VJ, Gilor C. Use of probiotics in small animal veterinary medicine. J Am Vet Med Assoc 2017;250:519-528.
  • Rudinsky AJ, Howard JP, Bishop MA, Sherding RG, Parker VJ, Gilor C. Dietary management of protein-losing enteropathy in Yorkshire terriers. J Small Anim Pract 2017;58:103-108.
  • Linder DE, Parker VJ. Dietary aspects of weight management in cats and dogs. In: Michel, K, Farcas AK, eds. Vet Clin North Am 2016;46:869-882.
  • de Brito Galvao JF, Parker VJ, Chew DJ. Update on feline ionized hypercalcemia. In: Vet Clin North Am 2016:47:273-292.
  • Furrow E, Jaeger JQ, Parker VJ, Hinchcliff KW, Johnson SE, Murdoch SJ, et al. Proteinuria and lipoprotein lipase activity in Miniature Schnauzer dogs with and without hypertriglyceridemia. The Vet J 2016;212:83-89.
  • Rudinsky AJ, Parker VJ, Guillaumin J. Mesenteric thrombus associated with pulmonary, splenic, portal and caval thrombi in a dog presenting for an acute abdomen. Can Vet J 2016;57:1072-1076.
  • Parker VJ, Gilor C, Chew DJ. Feline hyperparathyroidism: Pathophysiology, diagnosis and treatment of primary and secondary disease. J Feline Med Surg 2015;17:427-439.
  • Parker VJ. Nutritional management of chronic enteropathies. Today’s Vet Pract 2015;5:44-50.
  • Broome MR, Peterson ME, Kemppainen RJ, Parker VJ, Richter KP. Exogenous thyrotoxicosis in dogs attributable to consumption of all-meat commercial dog food or treats containing excessive thyroid hormone: 14 cases. J Am Vet Med Assoc 2015;246(1):105-111.
  • Parker VJ. Nutritional management of hospitalized dogs and cats. Vet Nurse 2013;4(8):478-485.
  • Yu MK, Freeman LM, Heinze CR, Parker VJ, Linder DE. Comparison of complications in dogs with nasoesophageal versus nasogastric tubes. J Vet Emerg Crit Care 2013;23:300-304.
  • Parker VJ, Freeman LM. Comparison of various solutions to dissolve critical care diet clots. J Vet Emerg Crit Care 2013;23:344-347.
  • Lee JY, Rozanski EA, Gaul M, Parker VJ, deLaforcade A, et al. Iatrogenic water intoxication in two cats. J Vet Emerg Crit Care 2013;23:53-57.
  • Slovak JE, Parker VJ, Deitz KL. Toxic shock syndrome in two dogs. J Am Anim Hosp Assoc 2012;48:434-438.
  • Parker VJ, Freeman LM. Incorporating enteral nutrition into practice. Vet Med 2012;107:400-410.
  • Parker VJ, Freeman LM. Nutritional management of protein-losing nephropathy in dogs. Compend Contin Educ Vet 2012;34:E1-E5.
  • Palic J, Parker VJ, Fales-Williams A, Jarvinen JA, Dubey JP. What is your diagnosis? Duodenal brush preparation from a dog. Vet Clin Path 2012;41:431-432.
  • Parker VJ, Freeman LM. Association between body condition and survival in dogs with acquired chronic kidney disease. J Vet Intern Med 2011;25:1306-1311.
  • Parker VJ, Jergens A, Whitley EM, Frana TS. Isolation of Cokeromyces  recurvatus from the gastrointestinal tract in a dog with protein-losing enteropathy. J Vet Diagn Invest 2011;23:1014-1016.
  • Parker VJ, Morrison JA, Yaeger M. Olfactory neuroblastoma: A case report and literature review. J Feline Med Surg 2010;12:867-71.
  • Parker VJ, Fischetti AR. Clinical snapshot: Lung lobe torsion. Compend Contin Educ Vet 2008;30:76-78.