Sounds like you have a clog. Try taking the bottom apart and cleaning the rollers and brushes out. Also check the hose for an obstruction.
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If your Dyson vacuum is emitting an unusual smell, see the [https://www.ifixit.com/Wiki/Dyson_Ball_Animal_Emits_Unusual_Smell_or_Noise|Dyson Ball Animal Emits Unusual Smell or Noise problem page] for possible causes and solutions.
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Sounds like you have a clog. Try taking the bottom apart and cleaning the rollers and brushes out. Also, check the hose for an obstruction.