there are a lot of people who home cook for their babies so you should get some good advise. I feed RAW so i can't help you too much, however i have noticed that home cookers need to add supplements to the food to make sure they are getting all the nutrients that they need.
Also, i think 1 1/2 cups of food a day is too much unless you have a bigger yorkie. 4.2kgs is 9.4lbs right? So maybe its ok. all i know is that my 4lb yorkie at 1/2 of kibble a day when i had her on that. I'm sure i'll be corrected when other home cookers discover your thread.
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