Yeah mate, sorry to be sarcastic; but don't believe what old timers tell you, and don't repeat it on here, just makes you look a prat !! NEVER feed a dog just before going out !! I give mine a half meal in the morning, then, when we get back from a lamping session, she is dried off, brushed down and given the other half of her meal when she has cooled down .
Cheers.