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Hola Marcela, castraria despues del primer celo, con llegada de hormonas al sistema nervioso por lo menos una vez.
Para algo estan ademas de la reproduccion.
La incidencia a tumores mamarios se mantiene baja.

Si es por manejo y animales de la calle,podrias antes del primero, pero aca no lo haria. saludos Pablo

hola dra marcela!!!!! yo realizo castracion temprana o prepuberal, tanto a hembras como a machos y no he tenido ningun problema. En IVIS y en otras muchas paginas puedes encontrar articulos sobre castracion prepuberal, igual como en todo hay quienes estamos deacuerdo con ella y quienes no, a mi como te lo dije anteriormente me encanta, la realizo de los 3 meses en adelante

Hola, en mi muy humilde experiencia no he tenido cproblemas con perras esterilizadas desde temprana edad (3meses) dejar que pase un celo es una oportunidad para tener una camada, de hecho he visto que la castracion en perras y perros pre puveres disminuye el aumento de peso que conlleva una esterilización a un animal mas maduro

Dra. Marcela:
le anexo un extracto de un artículo (retomado de otra pregunta en este mismo foro sobre el mismo tema), en el cual hay ALGUNAS consideraciones sobre la esterilización temprana versus la convencional...

(Surgical methods of contraception and sterilization
Lisa M. Howe *
Surgical Sciences Section, Department of Small Animal Clinical Sciences,
College of Veterinary Medicine and Biomedical Sciences,
Texas A&M University, College Station, TX 77843, USA)

...In a 15-mo study, the effects of prepubertal
gonadectomy on skeletal growth, weight gain, food
intake, body fat, and secondary sex characteristics were
investigated in 32 mixed-breed dogs neutered at 7 wk,
7 mo, or left intact [37]. Although growth rates were
unaffected by gonadectomy, the growth period and final
radial/ulnar length was extended in bitches neutered at
7 wk of age. Thus, rather than being ‘‘stunted’’ in
growth, they were actually slightly (as determined by
radiographs) taller. In a similar study, 31 cats were
neutered at 7 wk or 7 mo or left intact [38]. Distal radial
physeal closure was delayed in gonadectomized cats
when compared to intact cats; however, no differences
were detected between cats neutered at 7 wk or 7 mo for
mature radius length or time of distal radial physeal
closure.
The clinical significance of delayed closure of
growth plates is not clear, but it does not appear to
render the growth plates more susceptible to injury. In
the long-term studies of 263 cats and 269 dogs, no
differences in the incidence of musculoskeletal problems
were seen between animals neutered at a
traditional age or at an early age [33,35]. Further, in
the long-term studies of 1660 cats and 1842 dogs, age at
gonadectomy was not associated with the frequency of
long bone fractures [34,36]. In all these studies, long
bone fractures were rare overall, suggesting that physeal
fractures are not a common problem in gonadectomized
dogs and cats in general.
Long-term studies have examined the incidence of
hip dysplasia in dogs and the association with age at
gonadectomy. Although the study of 269 dogs found no
association between age at gonadectomy and hip
dysplasia, the study of 1842 dogs found that earlyage
gonadectomy was associated with a significant
increased incidence of hip dysplasia [36]. Puppies that
underwent gonadectomy before 5.5 mo of age had a
6.7% incidence of hip dysplasia, whereas those that
underwent gonadectomy at the more traditional age had
an incidence of 4.7%. However, those that were
gonadectomized at the traditional age were three times
more likely to be euthanized for the condition as
compared to the early-age group; the authors suggested
that early-age gonadectomy may be associated with a
less severe form of hip dysplasia...


si busca la cita completa enunciada al principio encontrará también datos relacionados con la incidencia de tumores en glandula mamaria e incontinencia vesical, si no encuentra el artículo en la red se lo envío con gusto a su correo, si usted estuviera interesada.

saludos
Guillermo Páez