Girls, hello! Why does the baby's tummy growl when he eats? We're on G…

Girls, hello! Why does the baby's tummy growl when he eats? We're on Gv, the first child was initially on Sw, and then completely on Iv. But now I haven't noticed such a thing with the first one. And now the stomach growls like he hasn't eaten all day, although it can withstand up to 2 hours. And another question, after childbirth, I started having an allergy, the doctor said that this is postpartum dermatosis, to refuse dairy products, fatty food and all kinds of food. In general, my diet consists only of chicken fillet and buckwheat, unleavened bread, black tea and cookies. I refused everything else because the allergy has not passed yet, and sometimes