Changes

*Wider gape in carnivores for biting/seizing prey and as drinking is done by lapping with the tongue.

*Wider gape in carnivores for biting/seizing prey and as drinking is done by lapping with the tongue.

'''Equine'''

===Equine===

*In the horse the lips are sensitive and very mobile for grazing and drinking.

*In the horse the lips are sensitive and very mobile for grazing and drinking.

'''Ruminant'''

===Ruminant===

*In the ox the lips are thickened and insensitive.

*In the ox the lips are thickened and insensitive.

'''Feline'''

===Feline===

*In the cat the lips are smaller in size and have decreased motility .

*In the cat the lips are smaller in size and have decreased motility .

'''Canine'''

===Canine===

*In the dog the lips are extensive but thin. Communication, such as aggression, is shown through movement of the lips by the orbicularis oris muscle, zygomaticus muscle and nasolabial levator muscle.

*In the dog the lips are extensive but thin. Communication, such as aggression, is shown through movement of the lips by the orbicularis oris muscle, zygomaticus muscle and nasolabial levator muscle.