icon
Diagnostic
Tests or procedures used by your vet to determine what is wrong with your horse, in order to reach a diagnosis.

Cost: Under $100

These cost ranges are approximate and may vary from region to region.
Additional charges may also apply.

YOUR VET MAY PERFORM

Foal or Newborn, Antibody Testing, IgG Test

Cost: Under $100

These cost ranges are approximate and may vary from region to region.
Additional charges may also apply.

Summary

Foals obtain their first, critical antibodies from their dam's first milk (colostrum). Failure to ingest and absorb these antibodies results in the so called "failure of passive transfer", a potentially lethal condition if not promptly remedied.

Veterinarians routinely test newborn foals for adequate antibody levels using a blood test.

Blood is usually taken from foals at the post-foaling exam. It may take 6-8 hours after nursing before the antibodies rise to their maximal level. We usually perform this test at 12-24 hours after foaling. Testing of neonatal foals for antibody is considered good standard of practice and likely reduces risk for failure of passive transfer.

There are several different "stall-side" test kits that are available for this test.

Why A Vet Chooses This Diagnostic

decor
  • icon
  • icon
  • icon
Show More
icon

Related Observations

Your vet might choose this diagnostic test if you were making these observations.

Very Common
Less Common
Rare
more observations
BENEFITS
Testing allows verification that a foal has absorbed adequate amounts of antibody. It is a simple, and relatively inexpensive test.

Early detection of failure of passive transfer allows for prompt administration of life-saving treatments.

LIMITATIONS

Some of the test kits are less reliable than others.

Enough time must be allowed for antibody levels to rise to their maximal level after foaling, usually 12-24 hours.

further reading & resources

Author: Doug Thal DVM Dipl. ABVP