I don't see that you need a shield at all, but make sure you power the servos from a separate power supply.
What is the "it" that may mess up?You can drive the servo signals directly (assuming we're talking standard R/C servos) from the Arduino, using the Servo library.
It depends on how neat you like your work to be, or how neat it needs to be.For a small number of servos, I'd probably just glue the connectors together side-by-side to make it easier to bus the power, and run individual signal wires to them.
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