Runny Poo With a Week Left and a Couple Other Questions

[Keno]

For weighing I have an old 25 lb. produce scale . I weighed 2 - 7 wk cornish x roosters yesterday by picking them up holding the wings against their body and resting breast /abdomen on the platform for a quick read on the scale of 9 lbs. each and a hen of same age of 7 lbs. The stayed still just long enough to look at the scale before wanting off