Recommendations for enrichment/training when dog is allowed nothing but prescription food

Our 9mo puppy was diagnosed with renal dysplasia this week. We’re devastated, but committed to making sure she has the best life possible for however long she has.

She also has stomach sensitivities. Our vet has given us prescription wet food, and that’s all we can give her for at least the next 3 months. No treats, no chews, nothing.

Any recommendations on how we can continue training and make sure she’s happy when we can only give her the exact same food? It’s a wet food, so a bit messy (she’s not a fan of the dry kibble version). We have a lickimat, but trying to think of other ideas!