Aggressive English Springer Spaniel
About 2 years ago my mom sort of impulsively bought a English Springer Spaniel puppy she named Samson from a pet store despite knowing nothing about the breed or the store/breeders she was buying from.
He's always been a nippy little thing but over time his behavior got worse and worse, to the point where he began to attack me, like, lunging at me growling and snarling and bearing his teeth. We tried yelling ouch whenever he bites and it worked for awhile but now it doesn't. There are times where he'll use his front legs to sorta grab me so I can't run, he's pierced my skin, left me bleeding and cry multiple times. He also doesn't seem to like it when I leave or close doors since whenever I leave to go upstairs he chases after me, barking all the way, same when I try to close a door, he'll even try to bite me if he can stick his face through the door. If this continues I may have to talk to my mom about re-homing him because honestly I can't deal with this anymore.