Frequently-Asked Questions

The Urinary Stone Analysis laboratory will be officially ending its urinary stone analysis service on July 31, 2020.  We will no longer be accepting any new submissions for analysis afteJULY 17, 2020.  Please make note of this date as we will not be able to return samples to you if they are received after this date. Click here for more information (pdf)

Frequently-Asked Questions

Q:  Can any veterinarian or animal laboratory send samples to the G.V. Ling Urinary Stone analysis Laboratory at Davis?

A:  Yes, we receive samples from veterinary practices and laboratories from all over the United States as well as several foreign countries.

Q:  How much is a stone analysis at UC Davis?

A:  Cost for crystallographic analysis: $75.00  -  Cost for crystallographic analysis with stone culture: $140.00

Q:  How long will it take for me to obtain the results?

A:  We have most stone analysis reports prepared within 2 to 5 days of receiving the sample.  If the stone is cultured, we will require an additional 3 days in order to monitor the plates for bacterial growth.

Q:  How should I prepare the stone to be shipped for analysis?

A:  Please wipe any excess blood or other material from the stone’s surface and place the stone(s) in any container deemed safe for shipping.  A plastic urine cup, red top tube, or other safe containers are all suitable.  If you wish to have us ship containers to you, please contact that laboratory at: 530-752-3228 or email us at:

Q:  What is your shipping address and contact information?

A:  Our shipping address is:

G.V. Ling Urinary Stone Analysis Laboratory
2108 Tupper Hall
University of California Davis
School of Veterinary Medicine
Davis CA 95616    
Phone: 530-752-3228
Fax: 530-752-0171

Q:  Can any pet owners submit stones they have obtained form their pets directly to the G.V. Ling Urinary Stone Analysis Laboratory?

A:  No, samples must come from a veterinary practice or animal laboratory.  By working with your veterinarian, we will be able to help you both tailor a proper stone prevention strategy for your pet.

Q:  Do I need to put the stone in formalin in order to send it to you?

A:  No. While formalin should not hurt most stones, exposure to formalin can affect struvite stones and can change the surface crystals from struvite to newberyite.  Additionally the,formalin will need to be removed prior to analysis and shipping a stone in formalin requires extra care and packaging to ensure safe shipping.

Q:  Does your laboratory analyze stones removed from human beings?

A:  No. We are not licensed to analyze stones from humans.

Q:  Should I send all the stones I have removed from the animal?

A:  Not always. If multiple stones are submitted to us, we do analyze several different ones of varying sizes as the composition can vary from stone to stone.  However, if numerous stones are removed from an animal, it seems prudent to keep a few at your clinic just in case the ones you have submitted are lost in transit.

Q:  How do I receive a photograph of the stone I have submitted to your laboratory?

A:  We do not routinely photograph all stones submitted in order to keep our costs as low as possible.  However, if you do wish to have a photo sent to you via email, please check the box on the submittal form and provide a complete email address.