A retrospective study of cardiac tumors in dogs showed that there was a 5 times greater risk of hemangiosarcoma, one of the three most common cancers in dogs, in spayed bitches than intact bitches and a 2.4 times greater risk of
hemangiosarcoma in neutered dogs as compared to intact males.
Not exact matches
• increases the risk of cardiac
hemangiosarcoma by a factor of 1.6 • triples the risk of hypothyroidism • increases the risk of progressive geriatric cognitive impairment • triples the risk of obesity, a common health problem
in dogs with many associated health problems • quadruples the small risk (< 0.6 %) of prostate cancer • doubles the small risk (5; this is a common cancer and major cause of death
in some breeds • triples the risk of hypothyroidism • increases the risk of obesity by a factor of 1.6 - 2, a common health problem
in dogs with many associated health problems • causes urinary «spay incontinence»
in 4 - 20 % of female
dogs • increases the risk of persistent or recurring urinary tract infections by a factor of 3 - 4 • increases the risk of recessed vulva, vaginal dermatitis, and vaginitis, especially for female
dogs spayed before puberty • doubles the small risk (< 1 %) of urinary tract tumors • increases the risk of orthopedic disorders • increases the risk of adverse reactions to vaccinations One thing is clear — much of the spay /
neuter information that is available to the public is unbalanced and contains claims that are exaggerated or unsupported by evidence.
Many factors are involved
in deciding when (or whether) to spay or
neuter dogs with a family history of cancer, especially: Transitional Cell Carcinoma,
Hemangiosarcoma, Osteosarcoma, Lymphosarcoma, or Prostatic Adenocarcinoma where the risk of cancer
in some breeds
in limited studies appears to be higher if the
dog is spayed or
neutered.
Project Abstract: This study extends the investigator's recently completed AKC Canine Health Foundation - funded project studying 12
dog breeds to identify major differences
in the degree to which spay or
neuter may be related to an increase
in joint disorders (hip dysplasia; cranial cruciate ligament tear) and / or cancers (lymphoma;
hemangiosarcoma; and mast cell tumor).
A more recent publication from U.C. Davis (de la Riva, Hart et al, 2013) looked at two joint disorders and three cancers — hip dysplasia, cranial cruciate ligament tear, lymphosarcoma,
hemangiosarcoma and mast cell tumor — and showed that, for all five diseases analyzed, the disease rates were significantly higher
in both males and females that were
neutered either early or late compared with intact (non-
neutered)
dogs.