There is literally nothing breed specific or species appropriate about any Royal Canin food. Most people who know me know that I believe that Royal Canin are the MASTERMINDS of marketing. Since pet parents often rely far too much on the front of the bag to tell them what food is best for their dog, be it that it has their breed of dog on the cover, has “real meat” and “veggies” on the cover, says small breed, large breed, adult, large breed adult, etc they often miss the ingredients which is where all the important stuff is. Oh and the GA (guarenteed anyalsis). I took the time to compare all the RC breed specific lines and found that aside from very slight protein and fat differences all the food was exactly the same, rotating the same first species innapropriate ingredients (whole ground corn, by-product meal, brewers rice, brown rice, corn gluten meal).
I would absolutely get her on a 5 star food. High in ANIMAL not plant protein moderate in fat and low in carbs. I’ve seen far too many overweight dachshunds and I know how easy it is for them to gain weight. As long as you know that she is healthy and has no known medical needs at this time this diet is fit for every breed of dog. Also PLEASE do not get hung up on the front of a bag. Worrying about if something says small breed or not or puppy or adult. As long as the nutrient profile is correct those things are not of much value. I have been feeding both my cat and dog adult and they are still a puppy and kitten and they havent had any issues. Also the small breed formulas are just smaller kibble sizes so you can go that route if u find that she is having trouble eating a larger kibble, just wanted to make you aware that small breed doesn’t mean its formulated differently for a small dog its just small kibble pieces. I also add a probiotic to their food to help with maintaining healthy bacteria in their gut to process the food better. I use Perfect Form made by the Honest Kitchen.
One thing the breeder did right was the suggestion of adding wet food to the diet. When on an all dry kibble diet dogs can live in a state of constant minor dehydration and later in life can face organ damage. So restoring some of the moisture to their diet is always a good thing. Soaking the kibble like you have been doing works too. We did that for our American Staffordshire Terrier when he was young. Seemed to help him be motivated to eat as well as digest the food. I believe there is a couple people on this site who use Kirklands wet food and seem to have no issues with it. Personally I do Whole Earth Farms stews, Wellness Core and I’ve tried 4health and will be trying other brands as well.
Another good thing to do is to find several brands that will work for her and rotate between them giving your dog variety and also different protein sources as to avoid building an allergy to one as dogs are not born with allergies, they get them through overexposure.
I wish you luck with your new baby! Feel free to ask questions here. There are tons of knowledgeable people that frequent these forums who have years of experience with dog nutrition and managing their dogs diets including fosters. And they are more than happy to offer help and answer questions.
