A paper on CCL found that, across all breeds, neutered males and females were 2 to 3 times more
likely than intact dogs to have this disorder [15].
Not exact matches
For both male and female Rotties spayed or neutered before one year of age, there was a one in four lifetime risk for bone cancer, and the sterilized animals were significantly more
likely to develop the disease
than intact dogs of the same breed.
In the study, spayed and neutered
dogs were also more
likely to develop behavior disorders
than intact dogs.
However, some male
dogs never learn this behavior and neutered
dogs are more
likely to squat to urinate
than intact males.
Dogs who are reproductively intact (unspayed females and unneutered males) are more likely to urine mark than spayed or neutered d
Dogs who are reproductively
intact (unspayed females and unneutered males) are more
likely to urine mark
than spayed or neutered
dogsdogs.
Other findings included that sexually
intact dogs from pet stores were three times more
likely to be aggressive toward their owners
than sexually
intact dogs from non-commercial breeders.
Neutered
dogs were eight times more
likely to suffer from prostate transitional cell carcinoma
than intact dogs.
On average, castrated
dogs are three times more
likely than their
intact counterparts to develop some type of prostate cancer.
«Male and female
dogs that underwent gonadectomy before 1 year of age had an approximate one in four lifetime risk for bone sarcoma and were significantly more
likely to develop bone sarcoma
than dogs that were sexually
intact.»
For example,
intact males constitute 80 percent of all
dogs presented to veterinary behaviorists for what formerly has been described as dominance aggression, are involved in 70 to 76 percent of reported
dog bite incidents, and are 2.6 times more
likely to bite
than neutered
dogs, while unspayed females «attract free - roaming males, which increases bite risk to people through increased exposure to unfamiliar
dogs,» and «contribute to the population of unwanted» and potentially aggressive
dogs (Gershman et al., 1993; Sacks et al., 2000; AVMA, 2001).
Research has shown that
dogs over 4 years old that are spayed or neutered are considerably more
likely to suffer cruciate tears
than dogs that remain sexually
intact.
A study utilizing the Veterinary Medical Database of over 40,000
dogs found that neutered males and females were more
likely to die of cancer
than intact dogs, especially of OSA, LSA and MCT [15].
Intact dogs are seven times more
likely to contract the disease
than ones which have undergone spaying or ovarihysterectomy (surgical removal of ovaries and uterus) before their first or second heat period.