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Owner Copy
Radiography Date: 08/08/97
Date Received: 08/13/97

                DOG                                            OWNER                                         PRACTICE

CH CHIEF SITTING BULL             RODNEY & MONICA                      CRAIG STOENNER
                                                             RINDLISBAKER                           ALL PET COMPLEX
AMERICAN                                     1933 NW 13TH AVE
Date of Birth: 07/16/93 Sex: M             MERIDIAN ID 83642                     6712 GLENWOOD

Weight: 66 lbs Age: 49 mo                                                                             BOISE ID 83703
RM090139/05

Distraction                             Degenerative Joint                Cavitation             Other Findings
 Index (DI)                                 Disease (DJD)

Right Hip   0.41                                None                             No                          N/A
Left Hip     0.50                                None                             No                          N/A

Right Hip

DI is greater than 0.30 with no radiographic evidence of DJD. There is an increasing risk of developing DJD as the DI increases; low risk when DI is close to 0.30, high risk when DI is close to 0.70 or above.

Left Hip

DI is greater than 0.30 with no radiographic evidence of DJD. There is an increasing risk of developing DJD as the DI increases; low risk when DI is close to 0.30, high risk when DI is close to 0.70 or above.

The Laxity Profile Ranking is based on the hip with the greater laxity (DI). If one of your dog's hips exhibits cavitation or has had surgery performed, the opposite hip will be used in the analysis. If both hips cannot be analyzed, the laxity profile ranking will not be performed.

This interpretation is based on a cross-section of 38 dogs of the AMERICAN STAFFORDSHIRE breed radiographed since 1986.

< Tighter                  70th                                                                                             Looser>
    >90 th                                                        Median                                                 < 10 th

The chart above indicates the ranking of your dog's passive hip laxity (DI) in relation to the AMERICAN STAFFORDSHIRE breed in our database. This result means that 1) your dog's hips are tighter than approximately 70% of this group of dogs (alternatively, 30% of the group has fighter hips than your dog), and 2) your dog's hip laxity is in the tighter half of the laxity profile. The median DI for this group is 0.58. Breed-specific evaluations are analyzed quarterly. Consequently, the average laxity and range of laxity for any given group will change over time.

PennHIP does not make specific breeding recommendations. Selection of sire and dam for mating is the decision of the breeder.

As a minimum breeding criterion, we propose that breeding stock be selected from the population of dogs having hip laxity in the tightest half of the breed (to the left of the median mark on the graph). Higher selection pressure equates to more rapid expected genetic change per generation. Please evaluate your dog's hip score accordingly. By implementing selection based on passive hip laxity, we expect the breed average DI over the years to move toward tighter hip configuration, meaning lower CHD susceptibility. The PennHIP database permits scientific adjustment of criteria to reflect these shifts; the average laxity and range of laxity for a particular breed will change over time. Please note that the PennHIP DI Is a measure of hip joint laxity. It does not allude to a "passing" or failing hip score.

SYNBIOTICS Please contact your PennHIP Veterinarian with any questions regarding this report