if your not afraid of being snapped at then yes, as soon as he grumbles firmly say no then continue what your doing...the grumbling is his way of telling you he doesnt want to do something...by doing it anyway your showing him you are the one in charge.
if your afraid he will know lol.
I dont suggest doing it EVERY time...but make sure to practice it once in a while so he learns that grumbling and such is not going to get him what he wants...
usually once or twice is enough to break the habit...
Dodger growled at me once when i tried to pick him up while sleeping...i firmly said no and picked him up...he growled for a few moments again i firmly said no and he realized i wasnt intimidated and hes never done it since...
vixie had a few episodes around the 8 month mark where shed growl and even snip at me (i call this teenager time lol) the first time i told her no 4 times and continued to do it, she continued so on her back she whent... she wriggled and grumbled for a few minutes before giving up...
over that month i think it happend mabe 3 more times where i had to pin her, the 4th time she grumbled and i told her no she had the point and stopped straight away, shes never talked back to me since! lol.
and since that point shes earnt her canine good citizen
Never once did i yell or hit or hurt or punish.
But i still respect her space...i just dont allow behaviour like that because you never know when a situation will arise in which a dominant dog will snip, vixie spent part of the pars summer with some very sick children they wouldnt understand that she just woke up and doesnt want to cuddle so desensitizing her to it was upmost important. im proud to say she has never even glanced funny at a child...and brought more smiles. she would never have gotten this far without that initiall attitude adjustment.
but im also not afraid of being bitten...you cant be afraid of a chihuahua bite when youve been bitten by animals much larger lol. so i never thought twice of ignoring the growl, i tell dodger when hes playing (hes a talker so he grumbles when he plays too) "you dont scare me" the different is...they know i mean it...
Ceasar milan does much the same thing with dominant agressive and posessive dogs, ive never seen him pin on a show however he does continue, if he wants that toy he coninutes to "challeng" the dog by continuing his nudging untill the dog finaly submits...but i like to add the firm no because this way the dog can learn what behaviour causes this with a verbal cue.
and some dogs respond to this verbal cue from moment one...with no need for continual correction.
of course this is a suggestion and im sure other people have other methods this is just what i have personally found works best!
I do stick by my suggestions but also feal do whatever works best for you!
it seems to be a very common problem in many chis, getting grumpy when woken.
and welcome aboard Ruby