They say snakes do it to sense the warmth and scent of things around them because they have poor eyesight or poor far eyesight or something like that is what I believe I remember from sitting in class. Yuck. Can't believe I just said that! (hate snakes)Is her vision okay? Test her eyes to see if she is seeing well? Probably reaching there as I don't know if mammals can even use their tongues as a reptile does.
Also, I'd check her teeth, gums, and throat to see if something is going on in there, pressing into the tongue. Maybe a sore tender gum and elongating tongue takes off pressure. Best thing would be to let a vet check her over as a little tumor could be developing or nerve problem in the back of the tongue controlling it could be compromising it. Sounds like the ability to retract her tongue at times maybe is being impinged. Or, due to pressure in there, it could be a relief to stick it out and perhaps take pressure off something. Anything like a swollen salivary gland or something I guess could cause that, too. I'd just let the vet check her.
__________________  Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |