When I take my 2 year old whippet dog for exercise in the first 100 yds he has 3 shits with a hard stool, then as he runs about he does 2 or 3 more but they are very runny is this normal for a whippet or am I feeding wrong. His diet at the moment is Chappie complete dog food Plus I give him some raw meet also some chicken scraps from the table. All advise welcome.