3 cups of Proplan is probably not enough. With good quality kibble you can feed less as there aren't as many fillers but you most likely will have to up by at least 1 cup. Delgado was eating 3 cups a day of Fromm LBP at that age and was up to 4.5 cups by 6 months, that's almost 2,000 calories a day at his peak and he was always lean. Go by the dog, not the bag or calorie count. If you can feel but not see the ribs, and there's a nice tuck to the stomach then keep feeding that amount. I would add or subtract 1/2 a cup based on what we had done that day and his current body condition.
Raw meat and kibble shouldn't be given at the same meal but split separately, so you could feed kibble one meal and raw the next but not mixed. They metabolize at different rates (kibble slow and raw fast) so you can end up with issues and it's not worth the risk.
Raw egg is fine anytime, but 3 eggs a day is a lot. You should always feed eggs whole and right away, that way they get the most nutrients and benefit.
Jasmine - Female Miniature Poodle - born Aug 15, 2010
Loker Delgado Von Stalworth - Male GSD - born Jan 26, 2012
Koda & Zazu - 5 year old male cats
Alex - Male Cocker Spaniel (rescue) - RIP Cuddlebug 2007-2010