While is sucks to be lied to, maybe you should have done your research a little better. The difference between a 4 month old puppy and an 8 week old one is pretty apparent. A 5 lb puppy is not big at all. We have a 4 1/2 lb chihuahua and everyone comments on how small she is. I don't think 1/2 lb is really going to make a difference. Also, you can't guarantee how big a puppy will get. Did you see the parents? That is really the only way of knowing and even that is no guarantee. And if you really feel as though you are "stuck" with this pup, I'd be more than happy to take him from you.
You should not have been lied to, but just think if she's treating you this badly...how is she treating the dogs????
It really think it sucks that you didn't get what you wanted and was lied to, however the weight chart is just an estimate anyways.
My puppy was about 4 oz at birth (average size for a chi), but she stopped growing at 2LBS. a friend of mine got a 1 1/2 oz (at birth) chi, and now, at 6 years old is 5lbs. but who would have known that a puppy 2 1/2oz less would grow 3lbs bigger? oh, and my girl's parents were 7lbs!
to be honest with you, the 5lb chi is just a tiny bit taller, longer and fuller than mine,
I have to agree with the majority, what difference does a couple of pounds make. The puppy will still be dependent on you whether it weighs 3lbs or 5lbs. I have one of each. My female-Piper is a tiny black and tan and weighs only 3 pounds, she is already just better than one year old. Piper is such a little lady.
My male-Jax, is 4 months old, weighs 5 pounds already and is still growing...he will be your standard size Chi, between 6-8 pounds. Jax is such a "boy". They are so different because their parents are different.
My advice to anyone who wants a Chi, please do extensive research, there is so much to know and learn. But when you make the decision you will never regret it.
FYI: before we purchased our Chi-Piper, we owned a German Shephard for 11 years, we had to have him put down, he had a degenerative spinal diease. We miss him very much.