18656207Abstract
Over a 2-yr period, an immature female walrus began to routinely regurgitate her food. This behavioral
problem ultimately resulted in a weight loss that was leading to a life-threatening situation. Medical causes for regurgitation
were ruled out based on the sporadic nature of the problem, physical examination, radiographic evaluation, and normal blood
parameters.
A variety of training, feeding, and enrichment techniques were employed in an attempt to extinguish the
aberrant behavior. One method the trainers tried initially was a technique that had been used successfully in a similar case at
another facility called satiation.1 The trainers attempted to satiate the animal by increasing the amount of food
offered each feed. The regurgitation improved initially with each enrichment or dietary change and then worsened in spite of new
creative attempts to eliminate the behavior. When these techniques proved unsuccessful and the walrus continued to lose weight, the
animal was treated with haloperidol (Haldol, Roxane Laboratories, Inc., Columbus, OH), a tranquilizer used in human medicine in the
management of manifestations of psychotic disorders. An oral dose of 20 mg in the morning and 15 mg in the afternoon proved
effective in controlling the regurgitation problem in this animal; however, it had several undesirable side effects, most notably
involuntary muscle spasms especially in the facial muscles and lips, and occasional spasms in the abdominal muscles. A variation on
the first satiation technique was then tried whereby the walrus was separated from the other walruses and fed fish from a tub until
she was satiated. This technique was successful and the animal gained substantial weight. Once the regurgitation problem had
resolved, the haloperidol was slowly discontinued over a 4-mo period. The walrus still regurgitated sporadically but continued to
gain weight on the satiation program and is now the same size as the other three walruses with which it was raised.
Acknowledgments
We thank Dr. Jim McBain, Dr. Michael Walsh, Dr. Tom Reiderson, Bill Winhall and Dana Wynn from the Sea World
Adventure Parks for their valuable contributions to this case.
References
1. Flynn T. 1987. Conditions and treatment of an eating disorder in a Pacific walrus-An anecdotal
report. Proc 15th Annual Conference of the International Marine Animal Trainers Association. Pp. 39-46.
Speaker Information
(click the speaker's name to view other papers and abstracts submitted by this speaker)
Laurie J. Gage, DVM
Six Flags Marine World
Vallejo, CA, USA
