I interview a lot of people and my advice would be no. There's a risk that the interviewer has a negative opinion of human cockfighting.
In general you want to avoid controversial topics. Don't say you're a Trump supporter. Don't say you hate Trump. Don't say Kanye West is an idiot. They might think he's great. Now, the one exception is if they say it first. If the interviewer says, "well I'll make this quick because I want to get home to watch Conor get knocked out" then you know it's safe to talk about.
Besides, being a fan is not a hobby. A hobby is if you train in martial arts, play basketball, go mountain biking, etc.
Watching something and posting about it on a forum is not a hobby that will earn you any respect.