Chances are pretty good it would break down quickly. If it's like most dry dog foods, it will have a mixture of meat, or fish meal, which would add nitrogen for sure. The other ingredients are usually grains, and vegetables, so that wouldn't hurt.
Be interesting to see how the greens grow in the area that you spread it, vs an area there was none. You may have discovered, a "new" miracle grow..
Kailaan is one of my all time favorite greens.
It is also known under the following names for those not familiar with it. Most seed companys will name it under one of these
Chinese broccoli, Kai Lan, Kailan, Gai Lan, Guy Lon, Whiter Flowering Broccoli, Gaai Laan, Jie Lan, Kai Lan Tsoi, Gelancai, Chair Lan, Kairan, Gailon
It is one of the first seeds sewn direct in my garden in spring, as it is very cold tolerant. I am still harvesting a meal or two a week from my April seedings. It keeps sending up new shoots in an effort to seed, so I just keep trimming them. If you don't keep up with the trimming in the hotter weather the small broccoli like heads rapidly turn to flower. I allow some to go to seed for the next years crop. Just let the mini-pods mature, dry them and strip the seeds out. No doubt it's a good veggie to grow in a fall garden.
My favorite way to eat it is by steaming it, and adding a drizzle of oyster sauce. The good premium oyster sauce, not the runny kind. Lee Kum Kee Panda Brand Oyster Sauce is a good one. A little goes a long way. I eat many of my greens with this sauce, chards, spinach, turnip greens, and even asparagus..try it sometime!
