"I didn't know you know dogs," Russell admits, surprised. "Enough for dog-proofing?"

That would save him a little trouble in the short-term, if Walter knows how to do it well enough. If not, they're doomed for hilarious antics of running after the dog all Benny Hill, back and forth across the flat to prevent various doggy dooms.

Even with the best dog-proofing, they may still have a little of that.