If you want a small size dog but you have too many dogs ?

Would you get rid of one of your dogs so you can get a smaller dog? Ok I know alot of people will say NO most likely but haven't you ever felt this way? So i lost my little shih -tzu i once had she was a tiny one so when she passed , later on i end up getting another shih- tzu. Well this one is alot bigger now she is 16pds. my other one was 5 to 8 pds. she lost weight with age and she was so little. well i have always wanted a real small dog or a tiny one , So now I find my self thinking Why didn't I wait and get me a small dog like I really wanted? I have always wanted a real small dog , and I when I see somebody with a small or tiny one I feel like oh i want one that Small!! I know most likely It would be hard to give my dog up now after i have had her for a year now. but it kinda gets me you know like I really want a smaller dog. And I know of someone that is wanting a Shih -tzu and said they would give it a real good home. but I wonder Could I do it ? could I give her away so i can get me a small one? even my spouse said to me One day, you don't care as much for that dog I can tell. which i didn't agree with him. I do care for her the one i have now. even though she is crazy sometimes, the other dogs have never liked her very much, she takes all the toys and thinks everything is hers. she does things she shouldn't do like mess with the other dogs poo. i hate that so i got all the dogs on these pills right now to make the poo taste bad in case she or one of them try to eat it! got it from pet smart but it ain't working to good, today she was back there messing with the poo again! but she is potty trained amd that's good. just wish she wouldn't eat poo sometimes. And wish she wasn't so selfish with the toys and sometimes i have to feed her alone or she will fight over certain kinds of food. not dog food but if i give them table food she will fight over it or if i accidental drop food she will fight over it. i have to watch her around my other dogs because you can't trust her not to start a fight over food or toys. she is just crazy but i love that dog. so if i give them a treat i have to hand it to each one and mot drop it on the floor or she might try to get it and if another dog trys to get it she may fight for it. this is just how she is. she thinks everything is hers. she can eat with all the dogs if its just dog food but that's it. i just know how she is so i take caution. if i throw a toy she is the only dog that will fetch it. my other dogs won't even go after the toy probably cause they know she will fight for it. and they are older then her. so i don't play fetch with them around her. I throw the toy for her cause she brings it to me and wants me to throw it. the other dogs don't do this. so i think she is smart in that way. but not smart other ways. and she does not like MEN ! when i take her Out to pet smart or places if a woman trys to pet her she is ok but if a man gets close she will growl at him! a guy ask me could he pet her and I said she doesn't like men, and so he tryed to get close and she growled at him. so i know she don;t like men and she has done this before with men. she doesn't do it to my spouse though. but he never pets her as i know of. but he does let her out of her play pen and stuff. but she never growls at him. so does anyone know why she would not like men? I don't know why. well thanks for reading and letting me vent. and most likely i can't give her up just thinking about it. and I am the one who always thought people were terrible to give up a dog just to get another one they wanted so i know how it is.