Yes, price and income affect the demand for veterinary services. But in the case of nutrition, education may be just as important.
According to the 2017 AVMA Pet Owner Demographics survey, clients are much more likely to understand their pet's weight condition if you provide a visual without labels.
AVMA's 2017 PDS shows that veterinarians have a huge opportunity to improve healthcare outcomes while increasing their bottom line as a large percentage of pets (dogs, cats, horses, birds, etc.) either aren't receiving healthcare that meets practice guidelines or they are receiving it but not from a veterinary practice.