I have an invitation to mince pies & mulled wine chez friends. Not been there since the summer when their dogs were very nervy and one bit DH (thick trousers so no real harm done). They have 2 dogs - apple of their eyes but blind to how they really behave to non family. How do I decline the invitation kindly but somehow get it across that while the dogs are milling about we cannot visit?
How can I stop people from 'helping' ?

Flexible!