I'm heading to the vet shortly
Jana, our 25 year old sorrel mare has a mass/tumor right along her esophagus. It's really strange and nothing I've seen before. It's about the size of a plum, hard and easily moves from one side of her neck to the other, totally loose and not connected to anything.
I'm sure we will be doing an u/s, scope?, possibly a biopsy? And plan to have her do a full blood panel. My mom & I suspect thyroid adenoma. I will let everyone know what I find out, our appointment is in a couple of hours.