The Huskies - Luisa Zissman, Dappy, Lee Ryan and Casey Batchelor - have had to endure tasks involving pulling the other housemates on a sled, drinking ice cold shots, and using their mouths to remove fish from lines.
However, Big Brother had a surprise treat for them last night - which they had to keep a secret from their fellow housemates.
The quartet were initially told that they would not be allowed to sleep in the warmth of the house and would have to bed down in their "dog kennel" in the garden.
They were all unhappy about the news, worried that they would not be able to sleep and would not have any food apart from perhaps slop.
"I don't know why you're suffering like this," Linda Nolan said in solidarity. "Maybe we're going to suffer some s**t. Hopefully we are. We're sorry, honestly."
However, as soon as the Huskies crawled through the entrance to their kennel they were thrilled to discover the Mutt's Nuts pub, which came with food such as pie and crisps, a dartboard, and the ability to watch their fellow housemates on a screen.
The Huskies were warned that they would fail the shopping task if the other housemates discovered that they were not living in squalor.
They were also required to keep up the act when they were allowed out into the garden, as they claimed that they had been given some "dry Christmas pudding" to eat and had drunk water out of dog bowls.
"They're going super hard on us," Dappy alleged. "I don't know what they want to see. Do they want us to get f**king upset and angry? You've done it, you've done it. You win Big Bro. What more?"
Meanwhile, Luisa joked: "Liz wouldn't treat her huskies like this."
Celebrity Big Brother continues tonight at 9pm on Channel 5.