By Mayo Clinic Staff. An intravenous pyelogram (PIE-uh-low-gram), also called an excretory urogram, is an X-ray exam of your urinary tract. An intravenous pyelogram lets your doctor view your kidneys, your bladder and the tubes that carry urine from your kidneys to your bladder (ureters).
The silver, silver dapple, chocolate flax or Taffy gene. Silver, or silver dapple is the common term used for horses with a dilution gene that works to dilute black pigment. The gene usually causes a partial lightening of black pigment in the body coat and a more extreme lightening (or âsilveringâ) of the mane and tail.
The dilution effect is often, but not necessarily, accompanied by dappling. The name silver dapple should probably be reserved for horses that have both dapples and a silver mane and tail. Not all horses with the dilution gene look like that. Similarly the term chocolate is often used in the Rocky Mountain Horse breed, but doesnât describe the color of all horses with the dilution gene.