I know that this is going to be shifted right out of the hivemind's awareness yet again, but given the Keiko, Pangolin, and Leaf chakra beast situations I have to raise it another time:
We have a way to address all of them. Summons are extremely long-lived and are probably both controlling their populations' reproduction and in a state of constant endemic war due to food limits. Leaf just lost enough ninja to raise the specter of needing to abandon territory due to being unable to control chakra beast numbers.
We have a summoner, soon two, and a Wakahisa. Chakra beasts have chakra. If we invite as many summons as we possibly can to participate they can run wild through the virgin wilderness massacring wildlife and dragging it back to be drained of chakra to fuel yet more summons while the humans cut off the horns, drain the humors, take any other valuable bits, and then allow the bodies to be sent to the summon realm for consumption and trade. In terms of return on investment it is far more profitable than fighting wars for agricultural territory, so that drains resources and incentives from warmongering and the enhanced trade does so further. Leaf gets oodles of safe new agricultural territory and an eager market for its enhanced food output. The Gouketsu get literal mountains of valuable chakra beast parts and serve as the lynchpin of a massive rapid-trade network on both the human and summon paths. Sage help the scorch squad who stumbles upon the reason Leaf's economy is booming in an area while out on a mission.
Keiko gets to solve her problem by selling food instead of weapons.
Oh, on another matter, since Noburi is going to become a summoner soon we need to make a note to remind him Jiraiya flipped the hell out at the idea of summons being chakra drained and that he probably shouldn't drain anything on or from the seventh path until he's at least asked the toads about it.
As long as I'm shouting into the dark, Hazou still hasn't copied those seals Kagome noticed in Akane's room in the hospital so Kagome could start analyzing them. If anybody's worried about Kabuto being nefarious that would be a simple, fast avenue of investigation.