Issue Title

Big Chickens are not behaving correctly.

Expected Behavior

Eggs should mature, with a chance of maturing at 1% post maturity date, and a chance of yielding a giant chicken egg at SIZE / 9.

Current Behavior

1. When their eggs mature, they will disappear with a much higher chance than expected. Matured 100's of eggs and only got 1 giant chicken spawn egg

2. When an egg matures, it has a chance of destroying eggs to the right in inventory.
   
   
   

3. Big Chickens are dropping stacked eggs, 2/3/4, instead of single eggs.
   

Steps to Reproduce (for bugs)

Spawn in a dozen Giant Chickens and wait for them to lay eggs. Watch eggs mature.

Context

Game Environment

GTplusplus-master-draknyte1-338

Misc Info

Check all that apply ([ ] -> [x] - use a lowercase x)

•    Using GT:NH/GT:New Horizons?
•    Single Player?
•    Multi Player?