Pass the salt!!

A group of people were banging on Bob's door screaming to be let in.
An angry Grrr in hot pursuit of them. 
Sticking his head out the window, Bob said: "Whata you want?"
"Please, you have to let us in an angry T-Rex is after us."
"Why? asked Bob. "Grrr usually does not bother anyone who does not bother him." 
"You do not understand. We are from the national food dept and have come to inspect to insure that creatures and people only eat what the Government allows them to eat..and that T-Rex was drinking ..gasp..Root beer and eating burgers..so of course, we ordered him to stop and attempted to remove the offending foods and drink ..when he went....he started to eat us!!!.You must do something."
'You are right" said Bob.
"Hey, pal, you may need this" Bob said...Tossing Grrr some salt !!!!!!!!!!! : )