Dog knot stuck usually occurs due to
anatomical defects in the reproductive tract of either male, female or both dogs.
The embryos survived long enough to have
distinct anatomical defects, including missing lower limbs and digits — and the absence of the entire lower urinary tract and penis.
Plain and contrast radiographic studies including IVP, double contrast cystography and retrograde and voiding urethrography should be sufficient to diagnose or rule out the presence of
major anatomical defects.
In some cases, a murmur indicates
an anatomical defect in the valves or chambers of the heart.
Occasionally, bacterial infection is due to
some anatomical defect causing urine pooling within the kidneys, ureters or bladder where bacteria can live.
If your veterinarian can not identify a blockage then causes to be considered include stones blocking the urinary tract (urolithiasis), a problem with your cat's body (
anatomical defects) and problems with your cat's behavior.
Mother cats may reject kittens with a medical issue or
anatomical defect.
Sometimes the difficult to house - train puppy has a bigger problem:
an anatomical defect that alters the basic plumbing of her urinary tract.
The English bulldog is particularly predisposed to
this anatomical defect.