This could be due to shedding, or if not, see a vet.
around the ears are the most common places for guinea pigs to shed dont worry
yes
Bald eagles have ears. They help to fly faster and to hear pray.
it has an extra eyelid
To help them fly faster.
Their coats are very short, sometimes almost bald in places. Their hair is usually a bit thicker around the scruff of the neck, and is often feathered on the tail. It is wiry on the top but very, very soft on their tummies, legs, faces, and ears.
Love.
Clear fluid draining from the ears usually indicates damage to the skull and the dura mater, the sac that fits around the brain. Red fluid draining from the ears is an indication of bleeding.
usually the breeder has this done around the age of 3-4 month, lately some breeders leave the dogs ears as is, flappy.
You are probably talking about just under the bottom part of the mouth. There are many cats (usually black cats) that can have sparse hair that makes them look bald in that area and this usually can be in front of the ears by the head as well. Eating grass doesn't usually make a cats so-called lips bald. If in doubt always see your vet to be sure your cat is healthy. Marcy
Usually their ears open completely around the age of 4 weeks.
Most domestic horses have a small section of their manes behind their ears shaved. This is called the bridle path. But it's not naturally bald- it's something humans do to make the horse look prettier or to prevent the bridle from getting tangled in the hair.