犬细小病毒感染的狗狗会出现精神沉郁、不食、呕吐、腹泻。病初粪便呈稀状，随病状发展，粪便呈咖啡色或番茄酱色样的血便并带有特殊的腥臭气味。后期严重脱水，眼球下陷、鼻境干燥、皮肤弹力高度下降、体重明显减轻的症状。建议你用等渗的葡萄糖盐水加入5％碳酸氢钠注射液给予静脉注射。可根据脱水的程度决定补液量的多少。然后配合消炎、止血、止吐、庆大霉素1万单位／千克体重，地塞米松0.5毫克／千克体重混合肌肉注射，或卡那霉素5万单位／千克体重加塞米松混合肌肉注射。维生素K11毫克／千克体重，Vk30.4毫克／千克体重，混合肌注。（注意：如果不是专业的兽医，请不要随便给宠物注射药物，需要专业的兽医操作）另外还有狗狗吃骨头刺到胃了、肚子里有寄生虫、还有是肠胃炎型狗瘟等都会引起狗狗拉稀便血，如果狗狗情况严重一般情况还是建议到宠物医院就诊，以免错过治疗时间。
以下是google 英文翻译：
Dogs infected with canine parvovirus will have depression, loss of food, vomiting, and diarrhea. At the beginning of the disease, the feces are thin, and with the development of the disease, the feces are brown or ketchup-like bloody stools with a special smell of odor. Severe dehydration in the later stage, the eyeball subsided, the nasal environment was dry, the skin elasticity was lowered, and the body weight was significantly reduced. It is recommended that you use an isotonic glucose solution with 5% sodium bicarbonate injection for intravenous injection. The amount of rehydration can be determined according to the degree of dehydration. Then combined with anti-inflammatory, hemostasis, antiemetic, gentamicin 10,000 units / kg body weight, dexamethasone 0.5 mg / kg body weight mixed intramuscular injection, or kanamycin 50,000 units / kg body weight dexamethasone mixed intramuscular injection. Vitamin K 11 mg / kg body weight, Vk30.4 mg / kg body weight, mixed intramuscular injection. (Note: If you are not a professional veterinarian, please do not inject drugs into your pets, you need a professional veterinarian.) In addition, there are dogs that eat bones to the stomach, parasites in the stomach, and gastroenteritis. It will cause the dog to pull the blood in the stool. If the dog is in serious condition, it is recommended to go to the pet hospital for treatment, so as not to miss the treatment time.
但是你已经做了抽血，是不是可以排除了？
另外， dog puppy不懂事， 很喜欢什么都要拿来啃啃， 容易咬碎了家俱， 玩具，误吞碎片。吞了金属制，塑料，木头，不仅可能堵塞，还可能碎片不规则，带尖的，划伤内部。 仔细查看，推敲。 同时询问vet，与vet商量下一步。
还有千万不要不小心把人的药掉地上。
再有，我家后院植物和花的种类繁多，留心puppy 误食中毒， 共勉。
理解你的担心。我相信dog比较皮实， 自我恢复能力较强。
