I would go with the current weight recommendations on the dog food bag or a little less, divided up, 3 meals per day, around 6-7 months go to 2 meals per day.
I have a 20 pound adult dog that eats about 1 to 1 1/2 cups per day (kibble mixed with a little cooked chicken, meat, scrambled egg or whatever) and a splash of water.
Funny thing, my 10 pound poodle mix eats the same amount! She has no weight issues.
Metabolisms, activity levels, etc ….
You will find what works.
Until you figure it out, I would weigh once a week. Stand on the scale, weigh yourself, then pick up the dog and get on the scale (I recommend one of those cheap digital scales from CVS, battery lasts about a year). Deduct your weight, note fluctuations….adjust diet accordingly.
PS: Also, see what your vet advises, they go to school for the same amount of time as a medical doctor, maybe they know something.
