Decided to wander around the Waltham series of articles on pet nutrition in
the J. of Nutrition today. If you want to search for the Waltham series
appearing yearly, type in dog canine (choose any at right) in the title box
on the search page. Articles are free full text (bless you people!) after a
year or 6 months, can't remember which now. Or if you have a yen to see
something now it's 20 bucks for a 30 day access to everything on the
website. Quite a deal if you want to see a lot of articles full text.

Anyway, this caught my eye:
http://tinyurl.com/ypsuwt
Lysine Content in Canine Diets Can Be Severely Heat Damaged1–3,

....*Because there was no relation between the proportion of the lysine that
was bound and the price for the canine diets evaluated, this suggests that
the main process causing the lysine to become bound is the heat processing
of the food (extrusion or pelleting). There was a very notable variation
between dog foods of different brands in the proportion of the total lysine
that was bound, with a range between 0 and 56% of the total lysine being
bound and thus nutritionally unavailable to the dog. This suggests that the
production systems, including conditions for extrusion or pelleting, differ
between manufacturers, and it is important to determine the conditions
necessary to minimize the nutritional "loss" of essential amino acids such
as lysine during processing....*

........they did NOT name the diets used in this study.

buglady
take out the dog before replying

buglady schrieb:
Decided to wander around the Waltham series of articles on pet nutrition in
the J. of Nutrition today. If you want to search for the Waltham series
appearing yearly, type in dog canine (choose any at right) in the title box
on the search page. Articles are free full text (bless you people!) after a
year or 6 months, can't remember which now. Or if you have a yen to see
something now it's 20 bucks for a 30 day access to everything on the
website. Quite a deal if you want to see a lot of articles full text.

Anyway, this caught my eye:
http://tinyurl.com/ypsuwt
Lysine Content in Canine Diets Can Be Severely Heat Damaged1–3,

...*Because there was no relation between the proportion of the lysine that
was bound and the price for the canine diets evaluated, this suggests that
the main process causing the lysine to become bound is the heat processing
of the food (extrusion or pelleting). There was a very notable variation
between dog foods of different brands in the proportion of the total lysine
that was bound, with a range between 0 and 56% of the total lysine being
bound and thus nutritionally unavailable to the dog. This suggests that the
production systems, including conditions for extrusion or pelleting, differ
between manufacturers, and it is important to determine the conditions
necessary to minimize the nutritional "loss" of essential amino acids such
as lysine during processing....*

.......they did NOT name the diets used in this study.

buglady
take out the dog before replying


Wow. After decades of research, dog food scientists have discovered
that "it is important to determine the conditions necessary to minimize
the nutritional "loss" of essential amino acids [...]during processing",
huh?

Thanks for the link and the search hint.

Sally