What is frightbite in a dog?

Has this dog been neutered? I mean that is a big start for a male. A unneutered male without training would act like this. I would start with getting the dog neutered.

Building trust and work lots of work. The dog need exercise too, lots of that. If you can’t walk him throw a ball a couple of times a day in the yard until you tame him down.

Neutering this dog (if he isn’t) could save his life.

Look every dog can be rehabilated. I work at a vet hospital and the number one thing most of our clients are wrong about is to avoid or not correct bad behivour because they think the dog had a bad life or was abused. I reccomend to you to read some Ceaser Millian books. you need to rewire the dogs mind and bring things into it’s life that it may fear and let them know you are not ok with that behavior. introduce the dog to new sounds, people, places, but with caution and with knowledge. But if a dog is acting out or behaving badly please don’t baby and and Say “ it’s ok good girl, shhh your alright, good dog,” You need to let them know what they are doing is not OK and you need to fix it. Please read up on dog training, You can work with this dog and break bad habits but a lot of the work needs to come from you and your family

Since is was deprived of human contact maybe its just scared of interracting with people.

Try being friendly with it & spending a lot of time together.

Give it treats & toys & go for walks.

Dont startle him or hit him.

Goodluck :D