Police used high-pitched sound cannons, tear gas, concussion grenades, rubber bullets and water cannons against the protesters (including their dogs) and forcibly removed the protesters from the camps. I am sad but not surprised that dogs (and other belongings) were left behind.
As for Sioux eating dog meat...
Other then yet another display of racism and bigotry, I don't know what your intention is. Those dogs were found and rescued. Millions of dogs are eaten all over the world. It is no more or less evil then eating cows, or pigs. It is not even against your religion. "Every moving thing that liveth shall be meat for you; even as the green herb have I given you all things." (Genesis 9:3)
Even cannibalism is permitted (if not mandated) "And thou shalt eat the fruit of thine own body, the flesh of thy sons and of thy daughters, which the LORD thy God hath given thee, in the siege, and in the straitness, wherewith thine enemies shall distress thee." (Deuteronomy 28:53)
If you have verses that contradict these verses, your bible contradicts itself. How can any one take the bible seriously?
Edit for Yushchyshyn:
The way I read it, the god makes those people eat their own children, you claim it is "only" as a curse, which is no less evil. Even if it is not the god who put the curse on those people then why is the god unable or unwilling to lift that curse?