Petfood Industry - January 2018 - 31
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fat or carbohydrates. Overall fat and carbohydrate consumption
significantly declined from 6,382 to 917 kcals per day and 553
to 214 kcals day, respectively. Protein intake remained constant
over the study and ranged from 4,786 to 4,156 kcals day.
These results, according to the study, impacted on
percentage total energy intake, with fat decreasing from 68
percent to 52 percent, and protein increasing from 29 percent
to 44 percent. "Our findings suggest
that dogs still possess a 'feast or famine'
mentality, wherein energy-dense fat is
prioritized over protein initially," say the
authors. "With continued feeding over
10 days, a transition to a more balanced
energy contribution from both macronutrients is evident."
first line of defense against age-related ailments. One study,
"Polyunsaturated fatty acids influence inflammatory markers
in a cellular model for canine osteoarthritis," was designed
to "further clarify how polyunsaturated fatty acids affect key
factors of cartilage degeneration in a canine cell culture system
mimicking osteoarthritis," according to the study's authors.
Canine chondrocytes were incubated either without or
Pet nutrition research has always
reflected pet food trends, which
currently means a focus on pet diets
and those diets' effects
on animal health.
Cat and dog health: taking
a closer look
Consuming canned cat food can be
considered a risk factor for the development of feline hyperthyroidism, and
a study published online with JAPAN
aimed to "determine whether increased
dietary selenium or water alters the
function of the hypothalamic-pituitarythyroid axis and leads to an increase in
The research, "Effects of dietary
selenium and moisture on the physical activity and thyroid
axis of cats," studied six neutered male domestic shorthair
cats. The cats were fed a commercially available adult dry
feline diet with 0.8 ppm selenium (the control), added sodium
selenite to increase the selenium concentration to 1.125 ppm
(the selenium treatment), and added water to reach a moisture
content of 75 percent wt/wt (the water treatment).
There was a significant increase in daily water consumption
with the water treatment compared to the control and selenium treatments, and the water and selenium treatments were
associated with greater activity over that of the control (by 20.5
percent and 11 percent, respectively). Serum concentrations of
thyrotropin-releasing hormone stimulation tests were greater
by 16 percent with water compared with control treatments.
According to the study's results, dietary water content may
alter the function of the thyroid axis, and this effect is associated with an increase in physical activity.
As pets live longer lives, old-age conditions are becoming
more prevalent, and pet owners are looking to pet foods as a
Industry January 2018
with 10 μm of eicosapentaenoic acid (EPA), docosahexaenoic
acid (DHA), arachidonic acid (AA) or 3.6 μm ibuprofen (Ibu)
as a positive control for six days. Then, cells were stimulated
with 10 ng/ml interleukin-1β (IL-1β) for another 48 hours to
induce osteoarthritic changes, or left unstimulated.
The results revealed molecular mechanisms by which
polyunsaturated fatty acids affect degenerative joint disease
in dogs. Of particular importance, according to the study's
authors, is that eicosapentaenoic acid and arachidonic acid
decreased several inflammatory markers in the model. The
researchers concluded that a balance of n-3 and n-6 fatty acids
deserves more attention in dietary interventions.
Continued focus: pet food trends
As pet food trends shift and gain in complexity, pet food
researchers will maintain their focus on animal nutrition.
Because pet owners often look to pet food as the fastest, easiest
way to affect their pets' health, it will continue to fall on the
research to help pet food formulators stay on the right track. ■