First and Second a) definition have nothing to do with formerly domesticated.
Common usage is often apart from base meaning, put another way, a term abused becomes muddled at the cost of accuracy.
"Feral" is a specific term that has lost some of its edge due to misuse.
So, let's just stick with "like a Lynx or Mountain Lion" as context rather than trying to force the exception.
Keep in mind that there are very nearly 300,000 distinct words in the English Language, including obsolete words. Compounds and derivatives bring this to very nearly 1,000,000.
The average American uses about 5,000. Any wonder why so many of those few that are used are abused?
As to "Opinion":
“You are not entitled to your opinion. You are entitled to your informed opinion. No one is entitled to be ignorant.”
― Harlan Ellison
Melrose Park, PA