Possible Diagnoses:

• Cluttering (excessive use of fillers plus rapid rate)
• Language Problems (word finding problems or language formulation problems)
• Avoidance (using fillers to avoid an oncoming stutter or sound that the child has difficulty with)

How to Differentiate:

• Look for other markers or symptoms of cluttering:

http://www.speechandlanguagekids.com/cluttering-webinar/

• Check their ability on word-finding and language organization tasks:

http://www.speechandlanguagekids.com/6-activities-to-improve-word-retrieval/

• Look for patterns of when the child uses the fillers.  Does it always happen before other speech or fluency problems?

How to Treat:

Once you have identified the root cause (or causes), address them with therapy as normal.