<human>: My 2 year old german shepherd had some sensitivity around her face on Wednesday night. On Thursday morning we found that the left side of her neck was very swollen and felt like it was filled with a fluid. She was very lethargic, wouldn't eat and was short of breath. We took her to the vet who took a sample and he thinks it is Sialocele, saliva draining from fluid pockets. We do schutzhund, a dog sport, it's possible she was hurt during that. The vet said it could be weeks or longer before the swelling goes away. Has anyone else had a dog with this problem? Do you know how your dog got it? How long did it take for it to go away? Did it require surgery?

Give me the gist of the text in a nutshell
<bot>: Has anyone ever had a dog who had Sialocele? How long did it take for it to go away?