So Frank, unless you’re the landlord how on earth can you even threaten eviction?
They don’t have written approval (I’m on the committee) – so the next step, a simple note – ‘keep your dog quiet – or either it, or all or you, will be evicted – without further notice’
And even if you are the landlord you have to follow a process.
I do hope you realise that even though you’re on the committee you also have to follow a process to deal with a noisy dog. Also, you may be giving conditional approval for them to keep the dog.
I.e. keep it quiet or it goes seems to me that if it stays quiet then they can keep the dog.