[Woogie Man]

Sounds like your vet didn't make any firm diagnosis but is playing it safe with the amoxicillan and by advising to just let her nurse. At 5 weeks a healthy puppy should be ready for some puppy food along with continuing to nurse. I start mine out on kibble soaked in water until it's mush. You can water it down more if there's any stomach upset at first. I"m not saying go against your vet's advice, just stating how it is with most pups. If she won't nurse, you can try a little karo on the nipple to entice her. As far as coccidia goes, I've never seen a clear answer on how a dog contracts it but that stress or a change in food can bring it on. I give my pups a 'just in case' treatment of Albon for 5 days a couple of weeks after they start eating food and I always get a clear fecal result. I'm guessing that it can be present but dormant in the intestines and can be expressed by stress or a change in food. Bloody diarrhea is never a good thing, especially in a pup so it's good you went to the vet. In an older dog, it could just be an irritable bowel. I've never personally seen it in a pup so I would have been worried too. Hope it all works out. Keep an eye on her: make sure her gums are a healthy pink and that she doesn't become dehydrated. At 5 weeks, she isn't as frail as a newborn but can still go downhill quickly.