The short answer is: maybe. Dental disease can be a big problem for your dog, especially if it's advanced. Sometimes, bad teeth need soft food, because hard food can be painful or impossible to eat. Tiny dogs like Chihuahuas are particularly prone to dental problems and disease because their mouths are too small for all their teeth, which can cause other complications over time. Ideally, dental disease is addressed by your vet, who can remove any dead, dying, or broken teeth to eliminate discomfort and inflammation. However, if your vet hasn't or cannot address the issue, consider soft food.