That tribble picture does look like an aerial view of Donald Trump.
Coincidence?
The pigs are scarfing the tribbles down and they have a preference for the more fertile ones, so litter size and frequency are decreasing due to selection pressure. The gerbils are finding lots of uses for them too, they make great floor mops for example, and bleach seems to be lethal to them. A small population in the eating areas is useful for keeping the floor clear of crumbs.
Now we've got natural hot springs, the capybara have piped some of the water and built some hot houses. The tribbles can't survive too much humidity and they make excellent compost.
Eta Cross post! Great minds, etc.