Sorry, I didn't pay attention to your other quest. You can achieve this in a variety of ways.
Although I think the carry function is broken(online).
You can do this though:
PHP Code:
setplayerprop #P3,chickenImage.png;
replaceani idle,carrystill;
replaceani walk,carry;
Requires a bit more working though. However if it's just offline you're using this for
canbecarried; should work fine. Which will be inserted into the npc you want to be able to carry.
You should take the time to look at commands.rtf in closer detail, GS1 is a really easy language which shouldn't really need assistance with.