Biewer Terrier Health

100% Normal 50% Carrier 100% Carrier
50% Normal

50% Carrier 50% Affected 50% Affected
50% Normal 25% Carrier 50% Carrier 25% Normal

100% Carrier 50% Affected 100% Affected 50% Carrier

GENETIC DISEASES

DNA/Genetic testing on breeding stock is something that the BTCC doesn't take lightly. The best way to produce healthy, happy puppies is to ensure that their parents are genetically sound. Nothing is ever 100% guaranteed in nature, but DNA testing of breeding prospects assists breeders in making informed decisions on breeding pairs.

AUTOSOMAL RECESSIVE MODE OF INHERITANCE CHART

CONGENITAL OR DEVELOPMENTAL DISORDER

Patellar Luxation is a condition in which the kneecap is displaced or dislocated from the knee joint where it belongs. Unilateral (only one kneecap is out of place) or Bilateral (both kneecaps are our of place) cases can be presented. This condition is common in all toy breeds, and may be a condition the dog was born with (congenital) or may it develop later in life (developmental).

ORTHOPAEDIC FOUNDATION FOR ANIMALS RATING SCALE

FOR PATELLAR LUXATION

GRADE 1

The patella easily luxates manually at full extension of the stifle joint, but returns to the trochlea when released.

GRADE 2

There is frequent patellar luxation which, in some cases becomes more or less permanent.

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.

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.