In March 2006, Deuce, a two-faced kitten, was born in Lake City, Florida, and was euthanized shortly thereafter, having come down with pneumonia. In June 2006, Image, a two-faced kitten, was born on and died later that year in Philadelphia, Pennsylvania. In June 2005, Gemini, a two-faced kitten, was born in Glide, Oregon.Polycephalic cats in museums include:

The Deformed Animals Museum of Llubí, Spain, preserves a two-headed kitten. The Museum of Lausanne in Lausanne, Switzerland, preserves a two-headed kitten (pictured). The Laing Museum in the small town of Newburgh, Fife, Scotland, preserves the stuffed body of a two-headed kitten born in the 19th century on Mugdrum Island. The Georgia State Capitol in Atlanta, Georgia, has a full body taxidermy of a two-faced kitten. Ripleys Believe It or Not! Museum on Clifton Hill in Niagara Falls, Ontario (Canada) has a full-body taxidermy of a two-faced kitten. Eton Colleges Natural History Museum has a full-body taxidermy of a two-faced kitten. Londons Viktor Wynd Museum of Curiosities, Fine Art & Natural History has a skeleton of a two headed kitten, a two headed calf, a two headed (and 8 legged) lamb and others

Cattle
A full body taxidermy of a two-headed calf is on display at the Garth and Jerri Frehner Museum of Natural History on the Southern Utah University campus in Cedar City, Utah. "The Dancing Calves" were born by natural delivery with considerable assistance from S. T. Nelson of Cedar City, Utah on Mothers Day, May 8, 1949, to a crossbred cow owned by Willard Lund of Paragonah, Utah.
They are usually asymptomatic but they may become thickened overtime and may be associated with an increased risk for glaucoma.Seizures typically develop within the first two years of life and occur in 75-100% of patients. Onset of seizures occur in 95% by the age of 5 years. Status epilepticus occurs in approximately 50% of patients. Approximately 25% of patients develop drug-resistant epilepsy. In these cases, surgery may be pursued with the two main approaches being lesionectomy and hemispherectomy.Neurological impairment can accrue gradually over time and may occur in the context of stroke-like episodes which may be triggered by seizures or head injuries. Intellectual disability occurs in approximately one-half of patients. In addition, patients with Sturge-Weber syndrome have an increased prevalence of depression, endocrinological abnormalities, headaches with migraine-like features, ADHD and behavioral problems. Cortically mediated visual field defects and hemiparesis occur in approximately one-third and one-half of patients, respectively. Von Hippel–Lindau syndrome (hemangiomatosis)
Von Hippel-Lindau (VHL) disease is an autosomal dominant condition caused by mutations of the VHL gene. Approximately one-in-five cases are de novo rather than familial and it has nearly complete penetrance. VHL occurs in an estimated 1 in 36,000-45,000 live births. VHL normally functions as a tumor suppressor gene and thus when not functioning normally results in the development of benign and malignant tumors as well as cysts. Some of the most common manifestations include hemangioblastomas in the retina and central nervous system, clear cell renal cell carcinomas, pheochromocytomas, endolymphatic sac tumors and pancreatic neuroendocrine tumors.