Although there is no dietary requirement for fiber in dogs and cats, there are health benefits of having certain fiber sources in the diet. (merckvetmanual.com)
Yes, a blender * might * compromise fiber integrity, but certain fibers actually hold water better after blender while others hold water worse, the digestive effects of which are basically speculative. (straightforwardfatloss.com)
Once the body adjusts to thirty grams, you can then start fiber cycling, another important process, since your body will eventually adapt to certain fiber types. (fitnessandpower.com)