some lyrics of "The Lion King"

[danieletpeggy]

Hullo,
I am Peggy. I am a newcomer here. I bought tickets for musical "The Lion King" , and I am going over the lyrics of it these days. Then I've got some questions on language. I cannot understand some paragraph like below sentence in blue. So I post here for help. Thanks in advance.
Seen in all the herds Shh, not a sound
Moving down the rank and file Take it slow
To near the bottom rung One more step
Far too many beetles are
Quite frankly in the dung Then pounce!
Aaaaaak!
Peggy,

[Tdol]

We have dung beetles, which lay their eggs in dung, but the song is implying that the beetles are in the dung, which is a polite way of saying in a mess ("in the sh*t), I think.
If you look here, you'll see tat the lines are separated and someone else says the 'Then' part: http://www.lionking.org/lyrics/OMPS/MorningReport.html