A puppys digestive system is still developing so it can suffer any number of digestive problems. Getting to the bottom of these issues can be difficult since they grow so quickly and their digestive systems change rapidly as they grow. Since puppies drink mostly milk their stools tend to be softer than those of adults. The high-protein liquid diet is not conducive to hard stools. Your tiny furry kid might appear to have diarrhea but his stool is actually completely normal.
Puppies are easily infected with E. bacteria. After birth the pup receives colostrum from its mother. Colostrum coats the digestive tract preventing infection. You may not be able to give your newborn pup colostrum if the mother is infected with E. coli which can cause your pup to get seriously ill. Vomiting lack of appetite cold skin and diarrhea are some of the symptoms of this illness. Unfortunately puppies are easily affected by this and would usually require hospitalization to recover.
Giardiasis is another common infection caused by the parasite Giardia. A puppy may contract this disease from contaminated water and soil or by coming into contact with another dogs feces. This infection tends to cause severe illness in puppies since their immune systems are still developing. There is severe diarrhea which results in loss of appetite fatigue and weight loss. In addition they can become dehydrated severely. Giardiasis can even be fatal if untreated. Puppies can usually recover from Giardiasis if they are treated in time.
If you want to read more about dog food tips read here: Dog Food Tips and Tricks.