Mrs Foster said one of the effects of Mr Foster's chemotherapy was he felt the cold much more.
"Even in Fiji he was still wearing a hoodie, it was 30C. We feel absolutely gutted and very annoyed, what a thing to come back to after being in Fiji."
The firewood itself was another generous gift from friends and family to help get the struggling family through winter. Mrs Foster said her mother and neighbour had offered to bring some of their own wood around, but it would not be enough to keep the home warm for the next few months.
"We're on the benefit, it just doesn't cover things like firewood. We need firewood to keep Rob healthy. He's terminal so winter is going to be a big thing to get through. He wasn't expected to make it past Christmas as it is."
Mrs Foster said nothing else on their property had been touched so it was obvious they had been targeted for the wood.
The garden shed it was stored in was left closed but unlocked, as was another shed with bikes and scooters which was left untouched. Their house was also left undisturbed.
The shed is situated right at the back of their fenced section, so it would have taken the thieves a lot of effort to remove all the wood, Mrs Foster said.