What exactly does the vet say? Is there any blood in the stool? mucus? Did the vet consider intestinal worms? How often does the puppy move his bowels? Has the pup been on the same food all this time? What kind of food are you using?

I have given him something for worms which was prescibed by the vet. He moves his bowels a few times a day. I have tryed 2 different foods which were recommended by the pet store owner. Right now I am feeding him puppy food with chiken and rice as the main ingreds.

A few times a day: 2 or 4?

When was the wormer prescribed? For which worms? (I am thinking giardia, specifically.)

Which brand of food? Perhaps someone here can talk about the food?

Have you tried giving him some pumpkin? That firms diarrhea, but if there is an intestional parasite or food reaction, it will keep occurring.

And what did the vet say? How long ago was the problem addressed with the vet?

You need a different vet if you are not getting straight up answers to your questions, and things are not going well.

You really need to take the upper hand with this and make it very clear that you are not happy. Pups are different than grown dogs. Their systems are not fully developed and problems can rapidly get worse. Set a time limit for improvement. Do this always with meds and medical conditions. Research everything you are giving the dogs and what vet says is wrong. Pin the vet down to a date when you should start to see improvement. If things don't change for the better by said date, and vet want's to change meds more than once, he/she probably does not know what is going on.

Altering food in any dog, but especially pups is risky. When you do switch, it needs to be done gradually over the course of about two weeks or dog will not adjust properly.

The reason for the problem needs to be properly diagnosed and treated A.S.A.P. by a qualified vet. You also need to consult about the food, you may be dealing with a food allergy.

SG

I agree with SG- if your vet is not giving straight answers, then find a new vet.

"I have tryed 2 different foods which were recommended by the pet store owner."

A pet store owner is NOT a vet, and dispensing medical advice such as feeding instructions to treat a medical condition is illegal. Not only that, but following such advice is ill-advised. A pet store owner has no idea how to diagnose or treat a medical condition, and just randomly switching foods on a pet store owner's advice is 1) delaying proper testing and treatment for your dog 2) counter-productive as switching foods itself can cause loose stools and 3) possibly dangerous if your dog has certain diseases that require a particular diet.

I would strongly recommend that you find a vet who is willing and able to devise a reasonable testing and treatment plan. Throwing random dewormers and random diets at the puppy is obviously not working. 6 months is a LONG time to have a potentially major GI disease go undiagnosed and untreated. I also agree with SG that if the vet's treatment is not working, the person to tell is the vet. For all s/he knows, your pup is doing perfectly fine.

I know you are worried about your dog, but really the person to whom you should address your concerns is a competent vet.

It is not clear how the vet actually addressed the problem, other than once giving him worming meds, which are often given anyway. So we don't know if the vet should be changed, or revisited.

But SG and Meghane are of course on track!

A friend of mine had the same problem recently, and was given antibiotics for his dog which cleared things up. I'm sorry I don't know any more details than that, ie what the diagnosis was. Maybe a stool sample was tested, or maybe the vet simply said "let's try this to see if it works".