Aggressive Corgi Mix
I just got a 4 month old puppy from the pound, he appears to be a Corgi mix. He has been very aggressive. He will start playing, and then will bark and latch on to my hand or arm without releasing until I pry him off. He continues this behavior and will wrinkle his nose and bite and latch on again. Despite repeated attempts at telling him "no" loudly and spanking him with a rolled up paper he continues the aggressive behavior. I am concerned for when he gets older that this behavior will be dangerous. He doesn't seem to have a concept of remorse if he actually hurts me either. I'm not sure how to deal with the behavior. Please help!