Dogs in estrus and maturity are in estrus twice a year. The estrus period in spring is from March to May, and that in autumn is 9- 165438+ 10, with an interval of about 6 months. As far as bitches are concerned, the estrus of bitches is marked by vaginal bleeding: vaginal bleeding usually lasts about 2 1 day, but the estrus of old dogs may be slightly shorter than one or two days.
Morphological characteristics:
Ears are medium-sized, upright, with round tips, brown eyes are medium-sized and oval. Eyes of medium size, not prominent, dark eyes and clear corners of eyes. The mouth and nose are beautiful and compact, lacking hair, which is an innate feature. The chest is moderately wide, tapering gradually and relaxing between the forelimbs. The rear drive is muscular and strong, but its width is slightly smaller than the shoulder. The car body is slightly smaller than Cartier.
The coat length is moderate, the fluff layer is short and thick, and the outer coat is long and rough, which can resist various environmental conditions. The hair length of the whole body varies, the collar, chest and shoulders are slightly thicker and longer, and the trunk hair is flat. The hair on the ventral surface of forelimbs, lower abdomen and hindquarters is relatively long. This coat had better be straight. This dog loses its fur easily. Hair colors include light yellow hair, golden hair, red hair, brown hair and white hair.
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