The Gastrointestinal Laboratory (GI Lab) at the Texas A&M School of Veterinary Medicine & Biomedical Sciences (VMBS)
provides specialized testing services to help veterinarians diagnose and treat gastrointestinal diseases in dogs and cats.



We cannot accept samples from exotic or agricultural species from outside the United States. This includes feline and canine exotic species. Additional information regarding international shipments is available under our sample requirements and histopathology pages, respectively. If you have specific questions, please contact us directly via email ( BEFORE shipping your samples.

Holiday Hours

The GI Lab will be closed Monday, December 26th and will return on Tuesday, December 27th. Please hold all submissions starting Friday, December 23rd and ship on Tuesday, December 27th.



As many of you know, we have been building a specialty histopathology service focused on gastrointestinal, hepatic, and pancreatic pathology. We are happy to announce that we are now ready to accept submissions. More information is available here.


We are happy to bring back the canine fecal alpha 1 – Proteinase Inhibitor assay. This test is now available on the updated submission form online. Fecal samples must be submitted using special pre-weighed fecal tubes that are only available through our laboratory. To order fecal tubes, please email The cost of 15 fecal tubes is $25. They will be mailed out via USPS for no additional charge. If you would like to receive the fecal tubes sooner, we can send them FedEx overnight for an additional $28. For more information, please see the assay page.


We are not here to receive packages on the weekends and they will sit unattended if delivered on Saturday, Sunday, or on a holiday, even if shipped using FedEx or UPS. Shipping using USPS (US Mail) is never recommended due to delays that will affect your results. The university post office may be closed anytime the university is closed. The winter and holiday season is approaching and with it brings shipping delays. Because of this and the ongoing pandemic, we may experience delays in receiving sample submissions and therefore, turnaround times may be extended. Click here for additional instructions.

Our testing services may help in the management of pets with vomiting, weight loss, diarrhea, loss of appetite, or poor body condition.

All samples must be submitted by a veterinarian. Veterinary specialists in Internal Medicine certified by the American College of Veterinary Internal Medicine are available for consultation to discuss the interpretation of test results with submitting veterinarians and their implications for patient management.

We cannot give advice directly to pet owners due to licensure issues.

Confused about Lipase Assays? Recently, questions have been asked regarding various lipase testing methods for pancreatitis.  For more information please check out pancreatitis information.

Gastrointestinal Laboratory

Dr. Jörg M. Steiner, Director
Department of Small Animal Clinical Sciences
Texas A&M School of Veterinary Medicine & Biomedical Sciences
4474 TAMU | College Station, TX 77843-4474

Maps & Directions | Giving to the GI Lab | Contact Us

Tel: 979.862.2861 | Fax: 979.862.2864