Hello! I have a 5 year old chihuahua puppy. He has a sad ear, shakes his head a lot and he sees the ear canal a little red and ....?

sounds like an ear infection. the vet will give antibiotics and maybe ear drops.

take him

Leave the ear alone and take it to a vet for a proper diagnosis/treatment. We're not vets, and you may well be exacerbating the condition and possibly making a proper diagnosis even more difficult.

Mmmm Firstly FIVE yr old puppies do not exist SO.......How bout taking it to a qualified vet as you shouldnt be putting anything smaller than your elbow in any dogs ear. Without knowing the damage you can do....that is

This little dog needs to see the vet asap she /he could have ear mites , an infection or another dog type ear condition which all requires a trip to the vet to get a proper diagnose and treatment(s)

Your puppy/dog needs a vet. He/she very likely has an ear infection. They are very painful and require veterinary treatment.