If their beaks are down in the seeds when they shake their heads, as I suspect you mean, they are trying to uncover their favorite seeds. House Sparrows, for example, are very fond of millet, so when they've eaten all the millet seeds they can see, they move the seeds around to find some more millet.
All dogs shake their heads, it's pretty normal
In most cases, Dogs shake their heads due to possible ear infections. If the dog is also scratching at his ears as well, then it's a sure sign of infection.
Why are you eating dirt in the first place?
to protect their heads from injury.
by eating barney. giving nadja money.
It's February 22! Coming up so get ready!
Flies can bite guinea pigs. They will bite and irritate guinea pigs, but no worries- that's how they lived in the wild. Notice that when flies go near their ears, they shake their heads. If you put your finger near their ear and softly touch the ear hair, they will shake their heads.
Usually they do this after they are done eating, to clean off any food that has gotten on their faces. Similarly, they often shake their heads after drinking water, to shake off any water droplets that have gotten on their faces.
For one, the story of Xenu and his space Boeings has given a lot of people something to laugh or shake their heads at.
mine where killed last night, two bunnies escaped, we heard the noise of the foxes but were too late, they left them after we disturbed them, there heads were off, i have been told, they grap them and shake them to break there neck, sick ah, but its nature.
The paw shaking is because they got a chill from the 1st moment the cold air hits them. They shake a paw or their heads also when you come in from the cold and they're waiting for you at the door.
They kick up their heels and buck and shake their head at their playmate; they love to butt heads with each other and lock horns.