Not sure yet, only discovered him tonight.
If you find someone who you think is a potential lolcow it's better to collect info and wait to make a thread until you have evidence of their lolcow-ery. Once you've collected info you can compile a decent OP with links and a brief overview of the cow so people can get an idea of who they are in one post.
If they don't chimp out online or desperately deflect criticism or proudly display their love/fetish for a fictional character or some combination of all of the above they probably aren't a lolcow.
Cringe isn't the same thing as lolcow. There's a lot of lolcows that are cringy and there's a lot of people who are cringy but not lolcows.
Brief list of lolcow basics:
1. They chimp out at any perceived negativity.
Examples: Wogglebug's reaction to the Oz fandom, Chris and blue arms
2. They have an obsession.
Examples: Chris and Sonic, PAB and pregnancy,
Often that obsession is turned into some kind of personal project, such as Sonichu or Maradonia.
3. They give out way too much personal information
Examples: DIRTY CRAPPED BRIEFS, revealing fetishes (Pamperchu), not making any effort to separate their real identity from their fetishes (Dobson).
A lolcow doesn't have all of those qualities, but they usually have at least one. If they don't respond badly to people they're almost certainly not going to be a great lolcow. If they don't overshare we don't really have information. If they don't have an obsession then again, there's not much to talk about.
Obviously mileage may vary, this is just meant to be a brief suggestion of how to separate lolcows from cringy people.