Hello my name is Hilda,I have 2 male dogs Cane Corso,they are 4 years old.,brothers(twins).One is calm and other is nervouse from begining,when he was a puppy.He shaking when he see something moving and he want to go after everything.They never was together with other dogs and people.We using DOGTRA electric colars,when we walk with them.Last month I went whioe his mouth and he bit me and tree weeks later,he bit my husband.I don't know what happened to him,but now I'm scared from him and I don't trust him anymore.I need some advise from somebody,what we have do with him.My grand kids come in May visit us and I don't want if something happen.