Hill's Prescription Diet b/d Brain Ageing Care is a veterinary dry dog food formulated for older dogs experiencing age-related cognitive changes. Developed by Hill's nutritionists and veterinarians, it targets the memory loss, reduced learning capacity, and behavioural shifts associated with canine cognitive decline — conditions that become more apparent as dogs reach their senior years.

The b/d formula is built around clinical nutrition to support brain cell function in ageing dogs. Hill's developed it specifically to address cognitive changes — rather than general senior health — that become more pronounced in older dogs. Chicken flavour. The 7.98kg bag is sized for continuous daily feeding under veterinary guidance, making it a long-term dietary management option rather than a supplement.

Prescription Diet lines are targeted rather than general, which is why they're intended for use under veterinary recommendation. The b/d is typically introduced when a vet identifies signs consistent with canine cognitive dysfunction — making it a responsive dietary change rather than a standard senior food.