OFA Patella Certificates for our Biewer Terriers

All our adults are certified health tested. The table below provides you with all tests performed for our dogs, including the results. You will find a more detailed database on the website of the Orthopedic Foundation for Animals.

AKCNameSexOFA #TestResults
TS29055401ROCKY MOUNTAIN MS MIRACLEFBYT-DM1/46F-PIDegenerative MyelopathyNORMAL
TS29055401ROCKY MOUNTAIN MS MIRACLEFBYT-HU1/46F-PIHyperuricosuriaN/N NORMAL
TS29055401ROCKY MOUNTAIN MS MIRACLEFBYT-PLL1/46F-PIPrimary Lens LuxationNORMAL/CLEAR
TS29055401ROCKY MOUNTAIN MS MIRACLEFBYT-PRA1/46F-PIProgressive Retinal AtrophyGENOTYPICALLY NORMAL FOR PRCD-PRA
TS29055401ROCKY MOUNTAIN MS MIRACLEFBYT-PA209/66F/P-VPIPatellaNORMAL
TS40345102ROCKY MOUNTAIN'S LADY ALICEFBYT-PA248/26F/P-VPIPatellaNORMAL
TS40726802ROCKY MOUNTAIN'S LADY ALMAFBYT-PA238/30F/P-VPIPatellaNORMAL
TS43999705ROCKY MOUNTAIN'S LADY BAMBIFBYT-PA232/12F/P-VPIPatellaNORMAL
TS43999701ROCKY MOUNTAIN'S LADY BELLAFBYT-PA227/12F/P-VPIPatellaNORMAL
TS33680402ROCKY MOUNTAIN'S LADY CHELSEAFBYT-PA225/44F/P-VPIPatellaNORMAL
TS33680401ROCKY MOUNTAIN'S LADY CHLOEFBYT-PA231/44F/P-VPIPatellaNORMAL
TS42889903ROCKY MOUNTAIN'S LADY COLLETTEFBYT-PA251/17F/P-VPIPatellaNORMAL
TS40727106ROCKY MOUNTAIN'S LADY DAISYFBYT-PA230/28F/P-VPIPatellaNORMAL
TS40726801ROCKY MOUNTAIN'S LADY GLITZ AND GLAMOURFBYT-EYE34/16F-VPIEyesNORMAL
TS40888701ROCKY MOUNTAIN'S LADY KERRYFBYT-PA224/23F/P-VPIPatellaNORMAL
TS42686901ROCKY MOUNTAIN'S LADY KIARAFBYT-PA257/29F/P-VPIPatellaNORMAL
TS43534601ROCKY MOUNTAIN'S LADY LACEYFBYT-PA239/22F/P-VPIPatellaNORMAL
TS42687002ROCKY MOUNTAIN'S LADY LAURAFBYT-PA262/31F/P-VPIPatellaNORMAL
TS42687001ROCKY MOUNTAIN'S LADY OLIVIAFBYT-PA237/31F/P-VPIPatellaNORMAL
TS40727103ROCKY MOUNTAIN'S LADY RUBYFBYT-PA254/28F/P-VPIPatellaNORMAL
TS42686902ROCKY MOUNTAIN'S LADY SOFIAFBYT-PA263/29F/P-VPIPatellaNORMAL
TS44680502ROCKY MOUNTAIN'S LADY TESSAFBYT-PA259/13F/P-VPIPatellaNORMAL
TS41538601ROCKY MOUNTAIN'S LADY TINKAFBYT-EYE32/5F-VPIEyesNORMAL
TS41538601ROCKY MOUNTAIN'S LADY TINKAFBYT-PA218/21F/P-VPIPatellaNORMAL
TS41643704ROCKY MOUNTAIN'S LADY TRINITYFBYT-PA250/20F/P-VPIPatellaNORMAL
TS43443003ROCKY MOUNTAIN'S LADY ZELDAFBYT-EYE35/4F-VPIEyesNORMAL
TS35102401ROCKY MOUNTAIN'S MISS BROOKEFBYT-EYE5/14F-VPIEyesNORMAL
TS35488501ROCKY MOUNTAIN'S MISS EMMAFBYT-DM12/19F-PIDegenerative MyelopathyNORMAL
TS35488501ROCKY MOUNTAIN'S MISS EMMAFBYT-HU12/19F-PIHyperuricosuriaN/N NORMAL
TS35488501ROCKY MOUNTAIN'S MISS EMMAFBYT-PLL12/19F-PIPrimary Lens LuxationNORMAL/CLEAR
TS35488501ROCKY MOUNTAIN'S MISS EMMAFBYT-PRA12/19F-PIProgressive Retinal AtrophyGENOTYPICALLY NORMAL FOR PRCD-PRA
TS35488501ROCKY MOUNTAIN'S MISS EMMAFBYT-PA213/38F/P-VPIPatellaNORMAL
TS29691701ROCKY MOUNTAIN'S MISS EMMYFBYT-PA245/55F/P-VPIPatellaNORMAL
TS29691702ROCKY MOUNTAIN'S MISS FLORENTINEFBYT-PA246/55F/P-VPIPatellaNORMAL
TS41538603ROCKY MOUNTAIN'S MISS LACEYFBYT-PA261/55F/P-VPIPatellaNORMAL
TS33928103ROCKY MOUNTAIN'S MISS LEYLAFBYT-PA226/43F/P-VPIPatellaNORMAL
TS32139302ROCKY MOUNTAIN'S MISS MELODYFBYT-PA258/48F/P-VPIPatellaNORMAL
TS29691704ROCKY MOUNTAIN'S MISS MIRANDAFBYT-PA253/55F/P-VPIPatellaNORMAL
TS32399001ROCKY MOUNTAIN'S MISS ODESSAFBYT-EYE62/45F-VPIEyesNORMAL
TS32399001ROCKY MOUNTAIN'S MISS ODESSAFBYT-DM25/46F-PIDegenerative MyelopathyNORMAL
TS32399001ROCKY MOUNTAIN'S MISS ODESSAFBYT-PLL26/46F-PIPrimary Lens LuxationNORMAL/CLEAR
TS32399001ROCKY MOUNTAIN'S MISS ODESSAFBYT-PRA26/46F-PIProgressive Retinal AtrophyGENOTYPICALLY NORMAL FOR PRCD-PRA
TS32399001ROCKY MOUNTAIN'S MISS ODESSAF152393Canine HealthCHIC - QUALIFIED
TS32404902ROCKY MOUNTAIN'S MISS PAIGEFBYT-PA221/47F/P-VPIPatellaNORMAL
TS32400504ROCKY MOUNTAIN'S MISS RACHELFBYT-PA222/47F/P-VPIPatellaNORMAL
TS32400503ROCKY MOUNTAIN'S MISS RAVENFBYT-PA255/47F/P-VPIPatellaNORMAL
TS32398501ROCKY MOUNTAIN'S MISS SAVANNAFBYT-PA260/47F/P-VPIPatellaNORMAL
TS32398704ROCKY MOUNTAIN'S MISS UNITYFBYT-PRA10/27F-PIProgressive Retinal AtrophyGENOTYPICALLY NORMAL FOR PRCD-PRA
TS32398704ROCKY MOUNTAIN'S MISS UNITYFBYT-PLL10/27F-PIPrimary Lens LuxationNORMAL/CLEAR
TS32398704ROCKY MOUNTAIN'S MISS UNITYFBYT-HU10/27F-PIHyperuricosuriaN/N NORMAL
TS32398704ROCKY MOUNTAIN'S MISS UNITYFBYT-DM10/27F-PIDegenerative MyelopathyNORMAL
TS32398704ROCKY MOUNTAIN'S MISS UNITYFBYT-PA211/47F/P-VPIPatellaNORMAL
TS35102701ROCKY MOUNTAIN'S MISS VENICEFBYT-PA240/41F/P-VPIPatellaNORMAL
TS35102702ROCKY MOUNTAIN'S MISS VIENNAFBYT-EYE6/14F-VPIEyesNORMAL
TS35102702ROCKY MOUNTAIN'S MISS VIENNAFBYT-PA162/15F/P-VPIPatellaNORMAL
TS35102702ROCKY MOUNTAIN'S MISS VIENNAF135127Canine HealthCHIC - QUALIFIED
TS35102702ROCKY MOUNTAIN'S MISS VIENNAFBYT-CA8/21F/C-VPICongenital CardiacNORMAL - CARDIOLOGIST
TS32398401ROCKY MOUNTAIN'S MISS WINNIEFBYT-PA228/47F/P-VPIPatellaNORMAL
TS29793601ROCKY MOUNTAIN'S MS AURORAFBYT-PLL11/34F-PIPrimary Lens LuxationNORMAL/CLEAR
TS29793601ROCKY MOUNTAIN'S MS AURORAFBYT-PRA11/34F-PIProgressive Retinal AtrophyGENOTYPICALLY NORMAL FOR PRCD-PRA
TS29793601ROCKY MOUNTAIN'S MS AURORAFBYT-HU11/34F-PIHyperuricosuriaN/N NORMAL
TS29793601ROCKY MOUNTAIN'S MS AURORAFBYT-DM11/34F-PIDegenerative MyelopathyNORMAL
TS29793601ROCKY MOUNTAIN'S MS AURORAFBYT-PA212/54F/P-VPIPatellaNORMAL
TS29881802ROCKY MOUNTAIN'S MS BERLINFBYT-PA233/54F/P-VPIPatellaNORMAL
TS31577502ROCKY MOUNTAIN'S MS GEMMAFBYT-PA223/50F/P-VPIPatellaNORMAL
TS31577301ROCKY MOUNTAIN'S MS HANNAFBYT-PA220/50F/P-VPIPatellaNORMAL
TS31577302ROCKY MOUNTAIN'S MS HOLLIEFBYT-PA235/50F/P-VPIPatellaNORMAL
TS29563201ROCKY MOUNTAIN'S MS KRASOTKAFBYT-PLL9/59F-PIPrimary Lens LuxationNORMAL/CLEAR
TS29563201ROCKY MOUNTAIN'S MS KRASOTKAFBYT-DM9/59F-PIDegenerative MyelopathyNORMAL
TS29563201ROCKY MOUNTAIN'S MS KRASOTKAFBYT-PRA9/59F-PIProgressive Retinal AtrophyGENOTYPICALLY NORMAL FOR PRCD-PRA
TS29563201ROCKY MOUNTAIN'S MS KRASOTKAFBYT-HU9/59F-PIHyperuricosuriaN/N NORMAL
TS29563001ROCKY MOUNTAIN'S MS NANCYFBYT-PA256/62F/P-VPIPatellaNORMAL
TS29945901ROCKY MOUNTAIN'S MS TONIFBYT-PRA6/41F-PIProgressive Retinal AtrophyGENOTYPICALLY NORMAL FOR PRCD-PRA
TS29945901ROCKY MOUNTAIN'S MS TONIFBYT-PLL6/41F-PIPrimary Lens LuxationNORMAL/CLEAR
TS29945901ROCKY MOUNTAIN'S MS TONIFBYT-DM6/41F-PIDegenerative MyelopathyNORMAL
TS29945901ROCKY MOUNTAIN'S MS TONIFBYT-HU6/41F-PIHyperuricosuriaN/N NORMAL
TS29945901ROCKY MOUNTAIN'S MS TONIFBYT-PA210/61F/P-VPIPatellaNORMAL
TS43999703ROCKY MOUNTAIN'S SIR BENTLEYMBYT-DM26/10M-PI-CARDegenerative MyelopathyCARRIER
TS43999703ROCKY MOUNTAIN'S SIR BENTLEYMBYT-HU21/10M-PIHyperuricosuriaN/N NORMAL
TS43999703ROCKY MOUNTAIN'S SIR BENTLEYMBYT-PLL27/10M-PIPrimary Lens LuxationNORMAL/CLEAR
TS43999703ROCKY MOUNTAIN'S SIR BENTLEYMBYT-PRA27/10M-PIProgressive Retinal AtrophyGENOTYPICALLY NORMAL FOR PRCD-PRA
TS29560801ROCKY MOUNTAIN'S SIR BOBBYMBYT-PLL4/42M-PIPrimary Lens LuxationNORMAL/CLEAR
TS29560801ROCKY MOUNTAIN'S SIR BOBBYMBYT-DM4/42M-PIDegenerative MyelopathyNORMAL
TS29560801ROCKY MOUNTAIN'S SIR BOBBYMBYT-HU4/42M-PIHyperuricosuriaN/N NORMAL
TS29560801ROCKY MOUNTAIN'S SIR BOBBYMBYT-PRA4/42M-PIProgressive Retinal AtrophyGENOTYPICALLY NORMAL FOR PRCD-PRA
TS38796501ROCKY MOUNTAIN'S SIR GUNNER MANMBYT-EYE11/8M-VPIEyesNORMAL
TS38796501ROCKY MOUNTAIN'S SIR GUNNER MANMBYT-DM7/10M-PI-CARDegenerative MyelopathyCARRIER
TS38796501ROCKY MOUNTAIN'S SIR GUNNER MANMBYT-HU7/10M-PIHyperuricosuriaN/N NORMAL
TS38796501ROCKY MOUNTAIN'S SIR GUNNER MANMBYT-PLL7/10M-PIPrimary Lens LuxationNORMAL/CLEAR
TS38796501ROCKY MOUNTAIN'S SIR GUNNER MANMBYT-PA185/30M/P-VPIPatellaNORMAL
TS40727101ROCKY MOUNTAIN'S SIR REMINGTON JR.MBYT-EYE12/7M-VPIEyesNORMAL
TS40727101ROCKY MOUNTAIN'S SIR REMINGTON JR.MBYT-PA215/28M/P-VPIPatellaNORMAL
TS40727102ROCKY MOUNTAIN'S SIR ROMEOMBYT-EYE13/7M-VPIEyesNORMAL
TS32400201ROCKY MOUNTAIN'S SIR VAREKMBYT-PA229/47M/P-VPIPatellaNORMAL
TS43443001ROCKY MOUNTAIN'S SIR ZODIACMBYT-EYE36/4M-VPIEyesNORMAL
TS29597901ROCKY MOUNTAINS'S MS ZARAFBYT-PRA8/49F-PIProgressive Retinal AtrophyGENOTYPICALLY NORMAL FOR PRCD-PRA
TS29597901ROCKY MOUNTAINS'S MS ZARAFBYT-PLL8/49F-PIPrimary Lens LuxationNORMAL/CLEAR
TS29597901ROCKY MOUNTAINS'S MS ZARAFBYT-DM8/49F-PIDegenerative MyelopathyNORMAL
TS29597901ROCKY MOUNTAINS'S MS ZARAFBYT-HU8/49F-PIHyperuricosuriaN/N NORMAL

Lateral Luxation in Toy Breeds

The patella, or kneecap, is part of the stifle joint (knee). In patellar luxation, the kneecap luxates, or pops out of place, either in a medial or lateral position. Lateral luxation in small breeds is most often seen late in the animal’s life, from 5 to 8 years of age. The heritability is unknown. Skeletal abnormalities are relatively minor in this syndrome, which seems to represent a breakdown in soft tissue in response to, as yet, obscure skeletal derangement. Thus, most lateral luxations are grades 1 and 2, and the bony changes are similar but mirrored to those described for medial luxation.
In mature animals, signs may develop rapidly and may be associated with minor trauma or strenuous activity. A knock-knee or genu valgum stance, sometimes described as seal-like, is characteristic. Sudden bilateral luxation may render the animal unable to stand and so simulate neurological disease. Physical examination is as described for medial luxation.

Patellar Luxation Grades

The Patellar Luxation Database is for dogs 12 months and over. Examinations performed on dogs less than 12 months will be treated as consultations and no OFA numbers will be assigned.

A method of classifying the degree of luxation and bony deformity is useful for diagnosis and can be applied to either medial or lateral luxations by reversing the medial-lateral directional references. The position of the patella can easily be palpated starting at the tibial tubercle and working proximally along the patellar ligament to the patella.

Grade 1: Manually the patella easily luxates at full extension of the stifle joint, but returns to the trochlea when released. No crepitation is apparent. The medial, or very occasionally, lateral deviation of the tibial crest (with lateral luxation of the patella) is only minimal, and there is a very slight rotation of the tibia. Flexion and extension of the stifle are in a straight line with no abduction of the hock.
Grade 2:  There is frequent patellar luxation, which, in some cases, becomes more or less permanent. The limb is sometimes carried, although weight-bearing routinely occurs with the stifle remaining slightly flexed. Especially under anesthesia, it is often possible to reduce the luxation by manually turning the tibia laterally, but the patella reluxates with ease when manual tension of the joint is released. As much as 30 degrees of medial tibial torsion and a slight medial deviation of the tibial crest may exist. When the patella is resting medially the hock is slightly abducted. If the condition is bilateral, more weight is shifted onto the forelimbs. Many dogs with this grade live with the condition reasonably well for many years, but the constant luxation of the patella over the medial trochlear ridge of the trochlea causes erosion of the articulating surface of the patella and also the proximal area of the medial lip. This results in crepitation becoming apparent when the patella is luxated manually.
Grade 3:  The patella is permanently luxated with torsion of the tibia and deviation of the tibial crest of between 30 degrees and 50 degrees from the cranial/caudal plane. Although the luxation is not intermittent, many animals use the limb with the stifle held in a semi-flexed position. The trochlea is very shallow or even flattened.
Grade 4:  The tibia is medially twisted and the tibial crest may show further deviation medially with the result that it lies 50 degrees to 90 degrees from the cranial/caudal plane. The patella is permanently luxated. The patella lies just above the medial condyle and space can be palpated between the patellar ligament and the distal end of the femur. The trochlea is absent or even convex. The limb is carried, or the animal moves in a crouched position, with the limb flexed.