When you spawn a mob with a spawn egg, it will make a high-pitched sound of that mob (as if it was a baby), then switch back over to adult. This also applies to mobs without baby states. I tested this in a realm and a normal world in Creative mode, if it matters.
MCPE-36540
Mobs make baby sounds when spawned by spawn eggs
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0
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However, this issue is a Duplicate of MCPE-33779.
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