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This is how many food related problems arise (and it's most often the humans who exhibit the problematic behavior like insisting their dog needs to be hand fed).
You already tried different brands of food, so it isn't that your dog is picky. Maybe he just wants a short digestive pause. Maybe he's ok with eating just until he's no longer hungry in contrast to ...
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The most simple thing to understand is that the puppy is young and independent. Sometimes rebellious :) Just like human babies, and like any other babies.
One reason why the dogs (regardless of age) prefer to go to the bed / sofa, even when it is forbidden, is that they need to be as close as possible with their masters, even when their masters are not ...
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There are multiple factors that determine a dog’s temperament and breed is just one of them. Others are personality, age and experience.
Of course a one-year purebred Malinois will typically be a nervous bundle of energy and a seven-year old pug will be mostly calm and settled, but that’s just average. The former may be unusually laid-back and the latter ...
1
There might be more behind this, so in either case trust your vet more than me as a random stranger on the net.
It's totally possible the vomiting is connected to normal digestion/instinctive behavior:
Assuming the vomit is some color between yellow and light brown and mostly consists of liquid and foam with potentially a few small bits of leftover food or ...
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