Sounds like things have resolved somewhat OP but FWIW I adore dogs and am a Self employed dog walker by choice so I spend my days surrounded by dogs of all shapes and sizes.
I'm well versed in challenging behaviour, basic training, body language etc.. I have a dog of my own who has good manners and enjoys the company of other dogs.
I have a dog home boarding license so sometimes accommodate a customer's dog for a week or two whilst they are away. I am not very house proud, am pretty tolerant of dog quirks and barks, and am a massive pushover / softie when it comes to animals.
But, I would not expect, or want, my family to rock up with dogs in tow on Christmas Day. In fact I've been in this situation with my ex-family (unfortunately my concerns were ignored my them and EXH) and it was a PITA for a number of reasons:
Some of the dogs had never met and so their interactions needed managing.
A couple were boisterous which upset the more timid ones.
The boisterous ones were racing around the garden to the point of risking injury (sharp stops, turns).
The small puppy managed to get out of my cat flap. She also was at the chewing stage which was nightmare around new toys, batteries, wrapping paper.
I had to be vigilant about DC's interactions with the dogs- not easy when hosting.
There were presents around containing unknown contents including food which I had to move out of reach- tricky with a house full.
As the day wore on people started to get drunk, and I had to play "watch the chocolate / Christmas cake / mince pies " as they were wandering about and leaving food all over the place which could have caused major issues for scavenging dogs.
It was exhausting and stressful for me, risky and stressful for most of the dogs who would have been happier snoozing in their homes TBH. No thanks or acknowledgment from anyone.
I don't miss EX's inconsiderate, self-centred family. Miss the dogs though!