My GSD puppy, who is about 4 months old, developed a cyst on her neck last weekend. It's about the size of my fist and was quite soft, fluid filled. We took her to the vet and have had it drained twice. My question is will it shrink on its own? Has anyone else ever been through this? She's not in pain, it's really just an eyesore now. She's on amoxicillian twice daily.

Call the vet and ask. The results somebody else had may or may not apply to your case.