People say both ways.
Ask you vet.
I just quickly skimmed top results.
Each result that was a proponent, was selling raised dog dishes.
Geriatric dogs are not found in nature, like pets. Geriatric dogs have other things going.
The following is not Gospel, clearly.
“Cumulative incidence of GDV during the study was 6% for large breed and giant breed dogs. Factors significantly associated with an increased risk of GDV were increasing age, having a first-degree relative with a history of GDV, having a faster speed of eating, and having a raised feeding bowl. Approximately 20 and 52% of cases of GDV among the large breed and giant breed dogs, respectively, were attributed to having a raised feed bowl.” (J Am Vet Med Assoc 2000;217:1492–1499)
“Cumulative incidence of GDV during the study was 6% for large breed and giant breed dogs. Factors significantly associated with an increased risk of GDV were increasing age, having a first-degree relative with a history of GDV, having a faster speed of eating, and having a raised feeding bowl. Approximately 20 and 52% of cases of GDV among the large breed and giant breed dogs, respectively, were attributed to having a raised feed bowl.” (J Am Vet Med Assoc 2000;217:1492–1499)
Seems like dogs need raised- food like trees need arborists.