So, I can't find any info to back up this person's theory of vitamin C causing bloat. I mean it's not like you're giving your dog an orange or lemon...

Many animals make their own ascorbic acid; they typically have much higher concentrations in their body than humans do. The common sugar, glucose, can be converted to ascorbic acid through a series of 4 steps, each requiring its associated enzyme. The final step involves the conversion of a molecule called gulonolactone to ascorbic acid. Unlike most animals, humans do not have the enzyme to effect this conversion and thus are dependent upon obtaining ascorbic acid through diet.
http://www.el-dorado.ca.us/~tstout/articles/vitc.shtml

If you are going to maximize the efficiency of vitamin C (metabolizing it) and use other nutrients essential to joint care, flavonoids have to be present in your pet’s body. There are hundreds of them and they are found in nearly every food you can think of. Fruits, vegetables and grains contain large amounts and that is the reason we recommend ample amounts of these in your pet’s diet.
http://www.arthritis-glucosamine.net...cle/aug02.html

more positive:
http://www.princeton.edu/~mcbrown/display/belfield.html
http://www.afpafitness.com/articles/DogsDonLie.htm
http://members.aol.com/abywood/www/vit_c.htm
http://www.cyberpet.com/cyberdog/art...ealth/vitc.htm
http://www.cm-d.com/buckeye/tech_manual/8_21.html
http://www.petsmart.com/articles/article_7050.shtml
http://www.skansen.com/nutrition/VitC.htm
http://www.mineralconnection.com/whypetvit.htm
http://samw.home.attbi.com/dachback/ester_c.htm
http://samw.home.attbi.com/dachback/ester_c.htm
http://www.5webdogs.com/dog_jointhealth%20.htm

negative:
http://home.att.net/~wdcusick/013.html

I searched the web and the only article I could find talking about the dangers of vitamin C is this one listed above, but, my lists of positive articles in support of vitamin C could go on much longer than this.

And if you're still concerned one the articles posted by the bloat link was about bloat being largely caused by lack of pro-biotic enzymes... go get a acidophilus supplement. http://www.pet-authority.com/prod01.htm That's the "good" bateria found in yogurt everyone is talking about.

I give my dog Vetbasis Healthy Breath & Body, it contains acidophilus and I have a gassy little dog, let me tell you :::whewwwww::: Since he's started on this product, the gas is gone. www.vetbasis.com

So for now, I think this peron is trying to scary all of you. Even the one article I did find on vitamin C being bad, didn't even mention bloat. Maybe you can find something.

What food are you feeding, I can tell you if it contains vitamin C or not.