I completely agree with what Paws and John have said - its very sensible.
the one thing I would say is that various foods are sold as being nutritionally complete and have passed all the tests they need - but are known for not being good quality - Bakers for one - google the reviews and what the dog food website says -
http://www.allaboutdogfood.co.uk/, that has some very interesting assessments.
At the end of the day its a case of what suits you, your pocket and your dog. Like Paws I have fed a home cooked food on vet advice for months because like her I have a special needs dog (!!) and he is on a specialist veterinary prescription diet but with liver problems I am not comfortable about moving away from this. I will tell you Bramble was fine on his homecooked diet - and loved it.
I would slightly disagree with Paws that dogs don;t get bored with the same food - Bramble definitely does. Paws knows that I have to go through all sorts of hoops to get him to eat the kibble - sometimes its because he is ill and liver problems make them feel nauseous, but sometimes its because he is that way out and he KNOWS if he holds out long enough I will cave - so will my vet. I commented to Jim the other week that Bramble had me well trained in the food department - Jim replied that he had us both well trained and that he also would just cave in to Bramble's desires!!!!!
Bramble is doing very well at the moment - but he gets fed Purina EN - expensive but actually cheaper than Orijen - together with a variety. Sometimes like this morning he gets kibble only, last night he had kibble and ham, sometimes, rarely because of the fat he gets kibble and cheese and quite often he gets cooked added which consists of either fish and potato and some of the stock or mince and potato and stock. This has emerged as a result of Brambles illness, if he doesn't want to eat he won't - and we have got to a stage on several occasions where my vet has said "I do not care what you give him - just get some calories into him" and often when we are at a down cycle Jim will often abandon the kibble and tell me to give Bramble home cooked - we vary the meat/fish and that works really well.
In terms of home cooked, my two always get a Christmas Dinner - the works - turkey, gravy, boiled rather than roast potatoes, all the veg except red cabbage - and they wolf it down.
My dogs, even Elsa, the lab who will literally eat anything and everything - not that it likes her very much - much prefers home cooked to kibble. She looks at me sadly when Bramble gets his mince and potato and looks meaningfully at his bowl before eating her own - and when she gets some veg or some of Bramble's cooked dinner that disappears before the kibble.
So as you can see there aren;t any right or wrong answers - if your pup is doing well on a mix of kibble and wet - carry on! You can give one meal of one and the next of the other or both, it doesn;t matter. If pups poos get loose then something needs adjusting or if they go the other way. If she gets fat or too thin again something needs adjusting.
If you want to try a home cooked diet - again as John said it isn't rocket science but you do need to make sure it is balanced and gives a growing pup what she needs - try it and see how she goes. I'm sure she will love it, but keep an eye on poos and condition - that will give you most of the answers you need...
I half feel that I ought to set what I have said about Bramble and his diet in context - so if you want me to I am happy to explain..