In case you don't know what a meerkat is, it is the small furry creatures that go 'I like to move it move it' in the movie Madagascar. It is such fun looking at them wrestle, investigate nooks and crannies or pop out unexpectedly from the sack, as they are doing now. There must be at least 5 meerkets in the sack!
The meerkat sentry takes his duties very seriously. While all his family members are gamboling in the sun, one meerkat stands alone on the highest point he could find, looking about to make sure that there are no predators around.
And if he can't find such a high point, even a log would do, though it only elevates him by a few inches. It means he can spot danger a microsecond before the rest. OK you little thing, don't take life so hard. You are a pet now, there isn't danger near you.