Help feeding a 4 month old underweight puppy
On february I adopted a 3 month GSD female, needless to say she was the cutest girl ever. Sadly, she was kinda underweight, I could see and touch her ribs and her skin clearly didn't have enough fat to cover them, her waist was really slim. The vet told me to mix her dried food (I feed her with RC maxi junior for large breeds) with chicken or any meat, so I did. Now she's been growing like crazy, last check at her new vet (with 3 1/2 month) she weighted 11.5 kg, but she still looks skinny, her waist is so narrow :C. I looked for better quality food and i found Taste of the wild (I live in Chile and couldn't find wellness or acana), but now i learned that it's really bad for puppies since it has a really high calcium content (because it seems it's made for all ages). I'm lost, don't know what to do. Up until now, I have mixed her dry RC food with rice, cow liver, beef and chicken breast (all of these are cooked), and I always feed her over the amount of dry food I should (plus that, I add the food I cook).
I found taste of the wild puppy pacific stream formula and it made me even more confused, since I read a lot of comments saying that TOTW didn't have a puppy formula, wich caused the calcium problem.
Can anyone give advice about this?, should I keep feeding her with RC or do I change it for TOTW? the vets I know doesn't really know about which food its better, but one of them told me to keep feeding her with my cooked food + dry food. Here in chile I can also get Brit care, is it a good option? Please help!
pd: she's always hungry