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 Issue 6

 
INSIDE UPDATE
 

Lions, tigers and bears – OH MY! It seems our zoological medicine department sees them all. 

In our hospital’s lobby I’ve seen giant iguanas draped down the front of people, admired exotic birds perched on owners’ shoulders, and heard the rustling of sugar gliders dangling from bonding pouches. 

What have I learned from all of this? A lot of animals can be worn as accessories! 

Because those exotic pets eventually require veterinary care, please check out this newsletter’s advice from our exotic animal experts. They are here to help advise you when you encounter a species you aren’t sure how to handle.

Ginger Passalacqua

Ginger Passalacqua
Referral Coordinator


SHINING SOME (UV) LIGHT ON RABBIT HUSBANDRY

SHINING SOME (UV) LIGHT ON RABBIT HUSBANDRY

DR. MARK A. MITCHELL DVM, MS, PHD, DECZM (HERPETOLOGY) 

Rabbits are popular pets, with 3.2 million in U.S. households, according to a 2012 AVMA survey. Veterinarians should be prepared to help educate their clients about best practices for rabbit husbandry. 

Rabbits’ lighting needs have not been explored in depth. Rabbits evolved to be crepuscular (active at dawn-dusk) to diurnal (daytime); therefore, they spend a fair amount of their day exposed to natural sunlight, which provides three important spectrums of light:

  • ultraviolet light, associated with the photobiochemical synthesis of vitamin D in some vertebrates;
  • visible light, which allows vertebrates to see in a certain range of colors; and 
  • infrared light, associated with the heat provided by the sun. 

The importance of ultraviolet radiation for captive animals is only now being investigated, primarily in reptiles. Because rabbits, much like diurnal reptiles, can synthesize vitamin D when exposed to natural ultraviolet B radiation, we recently studied the impact of artificial ultraviolet B radiation on the vitamin D levels of captive rabbits. We found vitamin D levels significantly higher in rabbits exposed to artificial ultraviolet B radiation than in their cohorts not exposed to ultraviolet B radiation.

Given the importance of vitamin D as an essential hormone that regulates many biological functions, a further study was completed by Dr. Megan Watson to evaluate the long-term (6 months) effects of exposing rabbits to ultraviolet B radiation. The findings reinforced the pilot study and showed that rabbits exposed to ultraviolet B radiation maintained significantly higher vitamin D levels over the course of the study. No side effects were found to be associated with regular exposure to ultraviolet B radiation. The research suggests that pet rabbits housed indoors would benefit from exposure to ultraviolet B radiation. 

It should be noted that housing indoor rabbits near windows will not provide exposure to ultraviolet B radiation because glass removes these short ultraviolet B wavelengths. However, commercial ultraviolet B light bulbs are available at many pet retailers. Current recommendations are that the lights should be placed within 9 inches of the animal’s cage and changed every 9 months, as the ultraviolet B radiation decays over time in these bulbs. 

Studies in chinchillas and guinea pigs found similar results, suggesting that these animals may also benefit from exposure to ultraviolet B radiation. We are planning further research into the role of lighting in the long-term health of pet rodents. 

1 Emerson JA, Whittington JK, Allender MC, Mitchell MA. Effects of ultraviolet radiation produced from artificial lights on serum 25-hydroxyvitamin D concentration in captive domestic rabbits (Oryctolagus cuniculi). Am J Vet Res. April 2014, Vol. 75, No. 4 , 380-384.


NON-OBSTRUCTIVE GASTROINTESTINAL MOTILITY DISORDERS OF RABBITS 

DR. JULIA WHITTINGTON, DVM

Because of the unique anatomical and physiological characteristics of rabbits’ digestive process, a high-fiber diet is essential for their normal motility and GI health. It’s important for owners to provide grass hay ad libitum and to watch for signs of GI disorders (decreased appetite, diarrhea, decreased stool production, lethargy, abnormal stance, and tooth grinding), any of which indicate veterinary intervention is necessary.

Any change in the normal microflora of the GI tract may lead to ileus or enteritis in rabbits. Stress, whether physiologic or environmental (such as a change in diet), has a direct effect on gastrointestinal motility and may result in GI ileus. 

Decreased motility and delayed or arrested gastric emptying may be brought about by gastric impaction of ingesta secondary to dehydration, foreign body ingestion, and mass effects as well as by stress, anorexia, lack of exercise, and ingestion of high-carbohydrate/low-fiber diets. 

Palpation in the cranial abdomen of a firm doughy stomach that extends beyond the border of the rib cage, with or without gas, is suggestive of gastric stasis. Abdominal radiography showing a distended stomach with fluid, gas, or consolidated ingesta with a gas halo is indicative of gastric stasis. Gas accumulation throughout the GI tract is seen with generalized ileus. Accumulation of fluid in the stomach or intestines in a critically ill rabbit may indicate an obstructive lesion. Prolonged gastric stasis may lead to potentially severe hepatic lipidosis and gastric ulceration. Aggressive therapy is generally indicated.

The hallmarks of treatment for non-obstructive GI motility disorders in rabbits are hydration therapy, analgesia, and the promotion of GI motility. Antibiotic therapy may be implemented as needed for bacterial infections. Providing analgesia is important when managing motility disorders in rabbits as pain will further reduce GI motility. Buprenorphine is an effective option. Non-steroidal anti-inflammatory medications may be implemented after the patient is rehydrated.

Rehydration therapy may be given by intravenous or intraosseous route in severely debilitated animals or by oral and subcutaneous routes in stable rabbits. Oral administration of a high-fiber gruel diet for herbivores will also help hydrate the stomach contents. Canned pumpkin, rabbit pellets mixed with water, and vegetable baby food may be substituted for commercial diets. 

Prokinetic drugs used to restore motility in rabbits include cisapride and metoclopramide. Some antacids, such as ranitidine, also have prokinetic properties. With prompt intervention and aggressive supportive care, most rabbits suffering from non-obstructive GI motility disorders recover completely. 

For more details about rabbits’ unique digestive system and how to treat motility disorders, see go.illinois.edu/rabbitgi.

COLLEGE NEWS

2014-2015 Directory for Referring Veterinarians

RVET DIRECTORY UPDATED AND IN THE MAIL!

If you did not receive your copy of the 2014-15 edition of the Directory for Referring Veterinarians, please request one from Ginger Passalacqua.  In it you'll find:

  • A handy pull-out poster lists important phone numbers and email addresses
  • All of the forms have been relocated to the back of the book for easier access
  • Doctor’s photos have been relocated to their respective service area page so you can easily identify who will be treating your patients

FACULTY KUDOS, FROM BOARDS TO AWARDS

The college is pleased to share the news of these recent faculty achievements:
  • Dr. Karanvir Aulakh – Diplomate, the American College of Veterinary Surgery
  • Dr. Igor Canisso – PhD in Veterinary Science from the University of Kentucky
  • Dr. Stuart Clark-Price – Certified in Veterinary Acupuncture
  • Dr. Santiago Gutierrez-Nibeyro – Diplomate, American College of Veterinary Sports Medicine and Rehabilitation
  • Dr. Devon Hague – Diplomate, American College of Veterinary Internal Medicine (Neurology)
  • Dr. Tisha Harper – Certified Canine Rehabilitation Practitioner
  • Dr. Margarethe Hoenig – 2014 Society for Comparative Endocrinology Oxford Laboratories Award for Excellence in the Advancement of Knowledge Concerning Small Animal Endocrinology
  • Dr. Jennifer Langan – De Facto Diplomate, European College of Zoological Medicine
  • Dr. Clifford Shipley – Practitioner of the Year Award, American Association of Small Ruminant Practitioners

Three new faculty members joined the clinical medicine department this summer and fall. Dr. Canisso, listed above, is part of the equine section focusing on reproduction. Dr. Fabio Lima does theriogenology with a bovine emphasis. Dr. Ryan Fries is a boarded veterinary cardiologist who will come aboard in October.

> > LEARN MORE AT vetmed.illinois.edu/news

faculty at surgical microscopes

CE OPPORTUNITIES

Thinking Outside the Exam Room

Presenter: Mark Middleton, Veterinary Education Network

Cost: $30 (Includes Dinner)

Date/Time: Oct. 23, 6-8pm

Location: University of Illinois College of Veterinary Medicine, Room 2251

CE Credit Earned

>> REGISTER AT 

go.illinois.edu/outside


 

FACULTY SPOTLIGHT

DR. KENNETH WELLE, DIPLOMATE, DVM

Dr. Kenneth Welle, who for many years had lectured and supervised students while a local practitioner, joined the clinical faculty full time in 2011.

What is your favorite thing about being an exotic animal veterinarian? 

The existing literature and knowledge base in exotic animal practice is so much smaller than in dogs and cats, and given the almost endless number of exotic species, the potential for continued growth of this information is phenomenal. I never go through a day without learning something new.

What would you like general practitioners to know about exotic animal patients?

I think the most important thing is that they don’t forget what they know just because the species is different. Sure, there are very important differences between exotic species and more familiar species, but there are far more similarities. 

Many times the limiting factor for seeing these species is technical. Collecting a blood sample from a bird can be a risky procedure for an inexperienced handler. As a result, sometimes practitioners proceed with less diagnostic information for an exotic patient.

Kenneth Welle