'Jack', an eight-year-old Jack Russell terrier, was presented at the clinic with constipation of three to four days duration and signs of faecal tenesmus. He had also started vomiting during the past 48 hours and was in appetent. He was drinking and showed no signs of dysuria. The owner informed us that he had been presented at another veterinary clinic a few months previously and was prescribed liquid paraffin. A perineal hernia had been suggested to the owner as the cause at that time.
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