The panting might be due to stress....if she's so totally focused on the toy and not eating or drinking like she should and worrying about the toy so.
My dog HaHa almost always has a toy. I call it it 'toy of the day' He will chose one, then pack it from room to room and even outside with him. Sometimes, his toy of the day might last 2 or 3 days then he'll get up one day and chose a different toy and that's what he packs around for a day or two or three.
He doesn't lick at it much, but he does bite down on it trying to make it squeak...not all of his toys are squeakies, but he has mental issues and cannot remember which ones do and which ones don't. I noticed he tends to keep the squeaky ones as his toy of the day for more than a day....and the non squeaky ones tend to be just for one day. I can, also at any time take the toy and he acts happy, like we are going to play, rather than upset that I have his toy of the day.
Anyway...he's not stressing over them, changes them out from time to time...all he does is pack them from room to room and plays a little with them...shaking them or biting them in excitement, like just before going outside, or before eating.
If your dog isn't looking relaxed with the toy...and you said she seems to be nervous when you are around it too... to me, that's a warning sign that it's not a healthy thing. She's resource guarding if she's not allowing you to touch it or look at it for very long and that's really really Not Good! If she were my dog, I would take it from her and then start on some training to help her with the resource guarding issue.
Stormy
My dog HaHa almost always has a toy. I call it it 'toy of the day' He will chose one, then pack it from room to room and even outside with him. Sometimes, his toy of the day might last 2 or 3 days then he'll get up one day and chose a different toy and that's what he packs around for a day or two or three.
He doesn't lick at it much, but he does bite down on it trying to make it squeak...not all of his toys are squeakies, but he has mental issues and cannot remember which ones do and which ones don't. I noticed he tends to keep the squeaky ones as his toy of the day for more than a day....and the non squeaky ones tend to be just for one day. I can, also at any time take the toy and he acts happy, like we are going to play, rather than upset that I have his toy of the day.
Anyway...he's not stressing over them, changes them out from time to time...all he does is pack them from room to room and plays a little with them...shaking them or biting them in excitement, like just before going outside, or before eating.
If your dog isn't looking relaxed with the toy...and you said she seems to be nervous when you are around it too... to me, that's a warning sign that it's not a healthy thing. She's resource guarding if she's not allowing you to touch it or look at it for very long and that's really really Not Good! If she were my dog, I would take it from her and then start on some training to help her with the resource guarding issue.
Stormy