Do these Yorkies HAVE NAMES ? IT sounds like you haven't really bonded with them at all if you just use terms like 'Big Guy' ...'Little guy' etc....
and it sounds like you really wanted a smaller yorkie and the larger is getting kicked to the curb.
When people bring a dog into their home - they should NOT have a preconceived weight goal set...unless of course you're a breeder etc.....but it sounds like you made some fast decisions and now the bigger yorkie is left out in the cold so to speak....
I hope he finds a good home where someone will love him and I really hope he gets the attention he deserves AND someone will always use his name....
Sorry...Sound a little harsh here... but I also read your previous posts and don't understand any of it.....ALL THE BEST to you and I hope things work out for you