You got great advice on this thread.
First, if your puppy's ears are not cropped, either crop them very soon, since her proper age time for that procedure is running out, or leave them alone. Did you see the thread that another member posted for you? Those have to be the one of the ugliest ears I've ever seen. You can clearly see that the shape doesn't match/suit the shape of his face ( when they're up like that ), and they just look ugly. The pup would be much better with his natural "unposted" ears. The dog in the thread looks like he's about to fly off any minute!
You said that you're not struggling financially, but that your hubby is worried about finances in general, which is normal for most people, including us. I've had my Dober girl for little over 3 weeks ( and we also have another dog, lab mix ), and let me tell you - Dobermans are an expensive breed!They may have a bunch of ( expensive ) health problems that you have to be prepared for. Also, like others have suggested, Puppy Chow isn't the best of foods - if you can afford, get a better one. The food rating website you were given is great - that's how I figured that my original food wasn't that good, and we upgraded to a 5 star food. While one can argue that we were still providing food for her, and there was "no need to change", especially since good-quality food is pricey, we disagree. While the new pricey food surely took away some of our spending money, it will be much better for our puppy in the long run. Not only is she getting a wholesome nutrition, her skin/coat improved dramatically when we switched to a quality food.
In summary, Dobermans are an expensive breed, that require a lot of attention. I have a toddler, and during the day, the three of us all play together for the most part. I also make sure to spend one-on-one time with my Dobie when my baby is asleep. Then, after Daddy gets home from work, he spends some one-on-one with the baby, and then we trade - he spends one-on-one with Domina ( Dobie ), while I do the same with the baby.
Hope you'll find these suggestions helpful. This forum helped me out a lot when it comes to the care of my puppy. Best of luck.