The dog is muzzled and taken by catchpole to the animal control van. He is whining a bit as this happens. Owner looks shocked, angry, and sad, and Kevin Bacon looks apologetic. However, most animal control locations have to quarantine by law after a bite incident for 10 days, so it isn’t confirmed that the dog is euthanized. But, as is typical for a bad screenplay like this, there is no follow-up on the dog (or cat). So, it is left up to the viewer to decide what happens beyond animal control seizing the dog.
Not between husband and wife although there are some verbal arguments. The daughter physicallly assaults both the mother and father in one scene. The sister also gets into a very short physical altercation with the younger brother.
The young boy tries to kill his grandmother’s cat. You don’t see anything, but you hear it hissing and screeching, and you see the grandmother’s horrified reaction (which sends her to the hospital.) It is implied that the cat lives, but not confirmed.
A very small amount of blood comes out of a character's mouth and appears on their face. Later, small amounts of blood are visible on a character's clothes but it is nothing more than one would expect from superficial cuts.