dogs are emotionless beasts, pay no mind to its supposed "crying", its just a defense mechanism to make people think they have feelings (they don't)
This man is smart, this is true even if he is just joking.
If wolfs cried like humans they would be extinct, giving away their location to other animals bigger than them like bears and such this trait was carried to their relative... The dog and dingos. So they don't cry tears, and they don't genuinely "cry".
Instead their scent changes, which the scent glands are responsible for. Our scent glands are primitive, so crying is the only options humans have. Our scent "glands" are located near the groin/crotch and armpits, where bacteria thrive. Dog and cat scent glands are typically located between the digits of the paws, another location is the around the brown town region. The scent is undetectable by all species, if their own. The un-scented scent(irony) changes the brain chemistry in their own species and similar species. Which causes certain actions to take place,"Aggressive behavior, Defensive behavior, etc." As stated before, we have something similar. But our scent glands are located near the groin and under-arm area. These scents are legitimately called "Pheromones." If you must know, the armpit scent glands are called the
apocrine glands.
SO! Dogs do not legitimately cry. It is a foolish defense mechanism that tricks you into to thinking they have genuine emotions. I don't know any animal with true emotions that eats babies. Because I certainly don't eat babies.
Bottom line. Dogs are selfish creatures and were never taught to be loving and caring. The only thing keeping them from killing their young is hard-wired instinct. To prove that dogs are not loving or self aware:
when giving birth they will walk around, EVEN SIT ON THE BABY THIS WILL loving KILL IT, etc., not knowing they are giving birth to a live being. Thus the baby is injured or even dead.Although dogs have emotions like fear. They are not to be interpreted like human emotions, we are not the same. Dogs have fear to keep themselves alive this is trigger by pain or intimidation, not for social communication.
The many known animals like us that will cry, mourn their dead, or even rescue other animals from danger are:
Elephants, dolphins, primates, etc.
Sorry for biology lesson. I just wanted to begin a crack down on pet lovers.