I have a 4 year old male Chihuahua who has been having "fits" of licking and scratching. I recently had him groomed-NO FLEAS or TICKS. However I have found 3 little black bugs on him that are not ticks. Anyway he itches and scrathes ALOT. I have checked him over several times and I do not find any bugs, bumps, or leasions. Help!!!!!