Pacing, whining, trouble settling may indicate inability to sleep. Try calming techniques.
Loud snoring, gasping awake could mean obstructed airways during sleep.
Sudden loss of muscle tone while awake may be narcolepsy. Seek vet advice.
Fidgety motions while sleeping suggest uncomfortable sensations in limbs.
Anxiety when alone can disrupt sleep. Work on independence training
Acting out vivid dreams by barking, running or growling during REM sleep.
Trouble sleeping at normal times could indicate a need for scheduling adjustment.