i have drawer full of clothes for each of my chiense cresteds, mymale is hairless so he does chill very easily, if its cold enough for ME to need a sweater its cold enoguh for him to need one.
he LOVES his pj's, if i ask if he wants his pjs on hell do his little dance and run to his drawer.
in the winter its generally fleece Pjs, if its realy cold ill even layer, in the summer he gets a cotton T-shirt as he does sunburn.
my female is a powderpuff but even in full coat the breed tends to "feel the cold" more...so generally i just watch her behaviour and if shes acting chilly i open the draw and she comes RUNNING, she LOVES to play dress up, doesnt matter what it is, she will try and dress herself, (no literally she pushes her head into whatever im holding and tries to get her paws in ect lol) and if you make the mistake of putting her pjs on before jasper she will then try and stick her head in jaspers clothes too!
Dozer only has a sweater and a jacket, hes still a growing boy but hes very tight and short coated so he will have a sweater for the winter, hif he acts cold ill put it on him.
im not a big fan of the dresing for the sake of dressing...cutesy harnesses fine, a t-shirt or sweater ect, but frilly lacey little dresses, hats, ect i just dont think my dogs woudl enjoy...
but dressing for the weather (cold, high sun on light or thin coated/hairless dogs ect) i have NO problems with as long as the dog doesnt mind.
as i said, my cresties LOVE to dress up...
my mums chihuahua however HATES it, it an be snow falling cold and damp and shell be curled up tight obviously chilly...but put a sweater on her and she SULKS, she refuses to move and loks miserable, so my mum doesnt bother with her, but the other 2 chihuahuas will wear clothes happily so in the winter they get sweaters and rosie gets an exctra blanket lol.
if your dog if comfortable wearing clothes (im talking a sweater or a fleece coat ect) and acting cold then theres no reason not to...ive NEVER EVER heard of properly fitted layers effecting a dogs ability to walk.
Chihuhauas DO feel the cold more than some other breeds, they have high metabolisms are tiny and are sun worshippers so they do (if they are comfortable) benefit from a cozy sweater if its chilly.
ruby strutting her stuff in a sweater, i think it shows fairly clearly that its no hinerance to her movment!
jasper in his jammies this past fall
and ruby in her jammies this past fall, as you can see she has FULL movment in them (and fleece is nice because it also stretches)
I wouldnt dress up a dog who obviously was uncomfortable in clothing...but if the dog doesnt mine i see no reason not to
my dogs seem to LOVE putting clothes on lol