but this 7-year-old golden retriever, brings calm to navy veteran jeremy terrell. >> i originally got him just as a pet when i got out of the service. and he was actually supposed to help me get a girlfriend. he failed, but he fulfilled the bill as my best friend, even better. >>reporter: terrell, who returned from combat with ptsd, also trained chaos to be a service dog. >> he's what's kept me going. because if i'm not going to change my life for me, then i'll do it for him. >>reporter: he's trying to connect other veterans with service dogs, terrell along with caucus. >> i'm hoping that we will figure out what kind of legislation is needed, what will actually help veterans the most. >>reporter: mental health, one of the top issues, he plans to introduce a bill that would teach ten veterans in colorado to train their own ptsd dogs. >> and then hopefully they will be able to turn around and do the same thing for other veterans, and the program will be self-sustaining. >>reporter: a gift of unconditional love. >> free to love on him, so he can love on you. >>reporter: for those who hav