UC Davis School of Veterinary Medicine Veterinary Genetics Laboratory
Frequently Asked Questions


How old does an animal need to be for DNA testing?
There is no age limit for DNA testing. However, if you are submitting a hair sample, we need 30-50 hairs with intact roots. If you are submitting a young horse, please pull tail hairs.

How long will it take to test my sample(s)?
Samples are tested in the order they are received. See the information page specific to the test being ordered for more details.

Can you RUSH my testing and/or parentage verification?
Every sample sent to the laboratory is processed as soon as delivered in the order received. Upon completion of the testing and analysis, the results are sent electronically to the appropriate registry. For non-contract, the results are either emailed or faxed and a copy sent in the mail.

Can you send the reports directly to me?
If you are testing through one of the registries on contract with VGL, the results are sent electronically to that registry. If you are testing non-contract, the laboratory will send the report to the owner or agent listed at the top of the submission form. Testing for non-contract cases will be initiated only after full payment is received.

I sent 3 samples at the same time to be tested but got my reports back at different times. Why?
Reports are sent out as they are completed. Possible reasons for delay could be: poor sample condition, insufficient information on the parents, problems obtaining a complete type on a stored sample of a parent and ambiguous results requiring retests of the offspring and/or parents.

Parentage Verification

How long will it take to receive the results of parentage verification?
This depends on many factors such as: volume of samples needing parentage analysis, condition of the sample, whether or not the parents have been updated from blood typing to DNA and if we have been provided with complete information on the identification of all possible parents including VGL case numbers. If all of the preceding conditions are met, DNA typing and parentage analysis should be completed within 2-6 business days.

Can I get my parentage analysis or test results by phone?
The VGL does not provide parentage analysis or test results over the telephone. For non-contract cases we can provide the test information via email or fax if the information was provided on the submission form. We will also mail a copy of the completed report at the same time. Contact the Veterinary Genetics Laboratory at 530-752-2211 for additional information.

Why do you need to test the dam? I know the dam.
You may know who the dam is but we need to know the genetic information the dam provides in order to deduce what genetic markers must come from the sire. Both parents provide an effective result that would be legally conclusive. Testing only one parent will give you one of two possible answers: the single parent can be excluded, or it could "qualify" as being a possible parent. This does not mean it is a parent, only that it could be.

How can I contact VGL with questions about animal services?
Please refer to our Contact page or Email form.

Veterinary Genetics Laboratory, Tel 530-752-2211, Email VGL