Hi I have a 3 year old dog who for the past 3 days has been doing this random thing where he lifts his head and "catches invisible flies"... Has anyone's dog had this? I'm taking him to the vet this afternoon and I don't really know what to think... I don't know if it's just behavioral or if I should really worry about it being neurological. Please help! Thank you!!

My Cavalier flycatches, I think it's a minor symptom of SM in her case.