I am going to go out on a limb here, but Jimmy and Whale feel free to stomp on me. I don’t usually give this sort of advice.
It sounds like your EC are hopeless and do nothing. That is a whole separate issue.
I would just move the dog in – I don’t think the EC will do anything, and if they do, then they are going to have to explain to all the other owners why their dogs have to go also.
I am sorry about your friend and am sure her (his?) dog will be happy with you, you are very kind to take it in.