DH has tried door too - won't budge. They had friends house-sitting for them for the first few days, so I wonder if they've done something to it? Have texted neighbour but no response - I'm worried she's got no reception or her phone isn't working abroad.
I guess we could buy some dry catfood and pour it through the letterbox - they still wouldn't get any water though.
Neighbours will be back on Sun - cats were last fed yesterday ...