On July 21, 1959, a one year old boxer bitch was presented at the Stange Memorial Clinic, Iowa State University, with a history of parturition seven days previously, the pups being normal in appearance and progressing satisfactorily. However, the OW11er became c011cer11ed when symptoms of sluggishness, anorexia and vomiturition were demonstrated by the bitch, even though she was still nurs ing her litter.