I think my puppy may be sick?

Take a stool sample to your vet and have it tested for parasites. There is no single deworming medication that will treat all of the different kinds of worms that dogs can get. So even though you dewormed him already, there's a good chance that you did not use the correct dewormer for the type of parasites he has. Also, some parasites are more challenging to treat than others and may take several rounds of medication and/or various different medication to get rid of. Either way, taking a stool sample to the vet and having it tested is the best way to determine what medication would be most effective.

After all this time why haven't you had him to the vet. You wormed him at 5 wks.when a pup shouldn't be wormed before 6 wks. so you obviously did an over the counter wormer because no vet. would have done it that early. You need to stop changing his food, that could be a good part of the problem you are making it worse.

You need to get the pup to the vet. and have a complete check up on him. You don't know what you are doing or you wouldn't have taken such a young pup from it's mother and not contacted a vet. way before this. You are going to do more damage to the pup.

Continuous changing of food isn't good for a puppy who is so young. When changing foods over it has to be gradual and done lightly over a period of time to ease that type of food into their system. Have you taken him to a vet more recently? The only thing I know is that changing the foods over that often will make the diarrhea much worse

You should take a stool sample to the vet to see what's going on.