A cow bite can hurt some but not much.
Cows don't typically bite anyone to begin with but if you were to put your hand in their mouth or your finger in their mouth the cow may bite but it won't hurt all that much or do any damage.
Cows can't bite a person because they don't have any upper front teeth.
When cattle are eating grass, they press their sharp bottom teeth against the top of their mouth, which is a hard palate.
This then cuts the blades of grass so they can chew the grass.
Cows have sharp teeth on the bottom of their mouths (called incisors) for cutting grass and other foliage, and large grinding teeth called molars at the back of their mouths on the upper and lower part of their jaws.
Cows can take around 890 bites per hour for about 8 hours a day. Due to the design of the cow's lips, teeth, and jaw a cow can't easily get closer than 2 inches from the soil.
An ideal height of grass is about 6 inches, higher or lower than that will consume more time and energy for the cow.
In addition, cattle have a relatively immobile upper lip (compared to goats and sheep).
Because of this unique oral anatomy, a cow uses its tongue to grasp a clump of grass and then bite it off.
A cow may become aggressive if she is forced to change a routine or moved to new surroundings.
When cows are part of a herd, there is a pecking order.
If a new cow is introduced to that herd, aggressiveness may happen as the new pecking order is established.