puppy dog food

At what age should I start feeding puppy dog / puppy food?
I just got a puppy 6 weeks. He seems to be having a difficult time eating the food they are given. I bought him Puppy Chow and I'm mixing with water to soften it up. It seems to eat so fast that just throwing upwards. Should I continue doing what I'm doing or should I try to bottle it for a week or until they are older? I'm beginning to think it was young people to leave her mother.
it was too Yound to leave her mother. Whoever he must have known that 8 weeks is the earliest age to leave her mother. nothing wrong with feeding him puppy food embargo. some dogs just eat fast. only must give a little food at a time, like a handful, and wait a few minutes between small amounts of food. hes not eating so fast because he did not throw up.
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