Just an update:
The lump has disappeared from Sassy’s throat. Apparently, according to a vet tech friend, it most likely was caused by a swollen trachea, most likely from being choked. That would fit with the treatment received from her previous owner. I also found out that she was born the first week of January, which makes her about 7 1/2 months now. Sassy is doing fine, loves to play, and thinks that everyone and all animals should want to be her friend…this includes cats and sqirrels…lol.