Could you perhaps set it up so that if NPC <1000 (which are most pets) it double prompts you ?
You have given $item to your pet are you sure this is what you wanted to do? If not target your pet and say "Pet Return Last Item" ..
Some type of check put in there to make SURE that only the owner can see that text (easy part) and make it so that only the owner can reverse the trade...
It is certainly not something that would make it onto PEQ since it's not something from Live.. However for custom servers this could be kindof a cool Idea..
We already have the code to do it too with the BOTS..
Just a thought
King