Bil-Jac to Wellness to Nature's Variety, Now Switching Again?

[Heather]

My mini goldendoodle is almost 5 months old, and in the almost 3 months that we've had her, she's been on 3 different foods. She started out on Bil-Jac from the breeder, but we wanted to give her something more high quality and so switched her to Wellness Super5 Small Breed Puppy. It seemed great - her stools were firmer and she seemed to be on more of a schedule with it. However, she started itching, and someone mentioned that dogs sometimes itch because of the salmon in Wellness, so we switched to Nature's Variety Prairie Puppy Formula. She's now gone through more than half a bag of the stuff and her stools are still mushy, to the point that I'm ready to switch her back to Wellness just because her stools seemed healthier on it. (She had an allergy shot at the same time we were transitioning to Nature's Variety, so she has stopped itching, but I'm not sure if it's the food or the shot.) 

I don't want to keep hopping from food to food, especially considering the way her stomach gets upset during the transitions. Should I go back to Wellness, or is there something else I should try?

Thanks so much! I really appreciate any advice you can give me!

[J and Riley (and Luna)]

Luna was on Wellness Super5mix for about 4-6 months and her stools were never that great and were very  bulky.  We switched her to a grain-free food (Wellness "Core" is grain-free, but we decided on TotW).  So far it's working really well and she really likes the taste.

If she was doing well on Wellness you could try their grain-free line.