My daughter and her husband actually had their dog at their wedding (and in some photos and the wedding cake topping had a very realistic stylized bride/groom/dog in icing) but, even she admitted later, that the dog had been a bit of a nuisance. I held the lead during the ceremony, which was held outdoors, but she wanted to jump up at the bride as she approached the groom and was whining!
The dog, whom all the family does love, bit off all the expensive flowers pinned to her lead and a sitter had to be found for the day ( while we ate, danced etc. ) as the dog wasn't allowed to be in the hotel venue room on her own. My daughter got told off the next morning, when we all came down for the wedding breakfast, as she hadn't booked the sitter for that.
I think the new DiL will be ramping up for saying no dogs at their house too, especially if children come along, so you will have to start thinking about regular alternate arrangements for your dog if you want to see them often. It's just the way it is. Some people like dogs and can accommodate them, others don't.