http://www.consumerreports.org/cro/magazine/2015/01/how-much-arsenic-is-in-your-rice/index.htm
In addition to analyzing the FDA data on rice products, scientists at our Food Safety and Sustainability Center tested 128 samples of basmati, jasmine, and sushi rice for arsenic. We combined the data with the results of our 2012 tests and FDA data on arsenic in rice for a total of 697 samples of rice. We also looked at the inorganic arsenic levels in 114 samples of nonrice grains. (You can read the details of our testing in our full report.)
Nicer rices
Our latest tests determined that the inorganic arsenic content of rice varies greatly depending on the type of rice and where it was grown. White basmati rice from California, India, and Pakistan, and sushi rice from the U.S. on average has half of the inorganic-arsenic amount of most other types of rice.
Our findings led us to treat those specific rices from those areas differently from other types of rice and rices grown in other regions. Based on our data, we calculated that consumers could have about twice as many weekly servings as we previously recommended if that was the only rice or rice product someone ate. For adults, that adds up to 4½ servings per week; children could have 2¾ servings.
All types of rice (except sushi and quick cooking) with a label indicating that it’s from Arkansas, Louisiana, or Texas or just from the U.S. had the highest levels of inorganic arsenic in our tests. For instance, white rices from California have 38 percent less inorganic arsenic than white rices from other parts of the country.
Brown rice has 80 percent more inorganic arsenic on average than white rice of the same type. Arsenic accumulates in the grain’s outer layers, which are removed to make white rice. Brown has more nutrients, though, so you shouldn’t switch entirely to white. Brown basmati from California, India, or Pakistan is the best choice; it has about a third less inorganic arsenic than other brown rices.
Rice that’s grown organically takes up arsenic the same way conventional rice does, so don’t rely on organic to have less arsenic.
Basmati
Approved varieties[edit]
Indian varieties[edit]
Dehradun, P3 Punjab, type III Uttar Pradesh, hbc -19 Safidon, 386 Haryana, Kasturi (Baran, Rajasthan), Basmati 198, Basmati 217, Basmati 370, Bihar, Kasturi, Mahi Suganda, Pusa (duplicate basmati), Pusa 1121.
Pakistani varieties[edit]
Basmati 370 (Pakki Basmati), Super Basmati (Kachi Basmati), cannabis basmati, Basmati Pak (Kernal), Basmati 385, Basmati 515, Basmati 2000 and Basmati 198.[11]
http://www.dogfoodadvisor.com/red-flag-ingredients/arsenic-rice-dog-food/
What Kinds of Rice Contain the Most Arsenic?
Testing by Consumer Reports1 found consistently higher levels of arsenic in the usually healthier brown rice than in white rice. That’s because the toxin tends to concentrate in the outer layer of the rice grain.
What’s worse, that same report also concluded:
“Arsenic concentrations found in the bran that is removed during the milling process to produce white rice can be 10 to 20 times higher than levels found in bulk rice grain”
However, if the government does not set a limit for arsenic in pet food, the potential problem could get worse for dogs.
That’s because it’s a good bet much of that tainted rice banned for use in human food will somehow — like so many other rejected ingredients — end up in commercial pet food.
http://company.justfoodfordogs.com/is-rice-bad-for-dogs/
Human grade rice is no comparison to feed grade rice, which is loaded with chemicals and preservatives. Feed rice is also not the whole rice, but the scraps of rice that are left over when rice products are made for human consumption. These are much more likely to absorb toxins during multiple processing stages. Most commercial kibbles and canned food will use feed grade rice; so with this part of the toxin controversy we agree – you should be weary of processed rice in commercial kibble diets, especially the lower quality brands.
http://www.three-little-pitties.com/brown-rice-for-dogs.html
Dogs need meat for protein and fat.
Healthy fats provide energy for your canine.
If you believe you need carbohydrates for energy, rest assured that dogs do NOT.
So why serve any grains?
To be blunt, only because it costs less than an all meat/organ/bone home made meal.
Never mix rice with raw meat (raw digests faster and the rice will slow it down causing tummy upset.)
Never feed brown rice or any carbs in addition to dog kibble. There's already too many carbs in the stuff.
If you see whole rice in your dogs feces, he is not digesting it so there is no point in feeding it. Cooked whole oats or quinoa are both good grains to try. Quinoa being the healthiest of all grains.