We’ve written before about the mythical creatures from the Riordan universe that would make the best pets. And while Fenris will be the first to tell you No, mortal. I am a proud son of Jötunn. You lack the strength to restrict my will, we can’t help but yearn to free him from Gleipnir, feed him doggie treats, and give him plenty of snuggles. If you ever do somehow find yourself looking after this apocalyptic lupine pup, here are some essential tips.

Never Skimp on Grooming

That sheen on Fenris’s coat doesn’t come naturally. As much as he would like to convince you otherwise, his fur only shines after a long bath in the blood of Asgardians.

Keep Him on a Steady Diet

Fenris will undoubtedly scoff at the notion of having to eat lowly kibble. His taste for raw Asgardian flesh and bone will be a challenge, but if you wanted a low-maintenance pet, you should’ve gotten a Betta fish.

Secure the Right Leash

Fenris has been tied up for so long, he’s become used to being kept on a rope. He may grumble and growl when you first snap a collar around his neck, but pay him no mind. It beats having to run after him when he tries to chase some poor demigod. And don’t skimp—you need a top-of-the-line, Sumarbrander-resistant leash. You’ll thank us later.

Keep Him Away from Relatives (Yours)

While you’re on your walks, well-meaning people may approach, hoping to stroke your pet. They should always ask for permission first, though, if they value their hands. In the case of Fenris, it may well be worth investing in a shirt that reads don’t even think about It.

Keep Him Away from Relatives (His)

It’s always sad to take a dog away from his family, but sometimes it’s necessary. In the case of Fenris, it’s crucial. Sure, Alex and Samirah could visit, but we don’t think they’ll want to. Between Fenris’s psycho father, and his wretched sons, Sköll and Hati, it’s probably best to keep the family reunions to a minimum.

So, in short: Just make sure Fenris doesn’t come in contact with any strangers, any other dogs in the neighborhood, any of his family from the Nine Worlds . . . anyone at all, really. Why did we think this was a good idea again?