It bothers me as well. My younger siblings married before I did, I still had the first grandchildren in my family, all thanks in part to those younger siblings getting dogs first. Dogs never leave infant maturity, actual human babies usually do.
Same here.
I tell my siblings that their dammed dogs won’t grow our family tree, no matter how much they want it to.
Will they put gravestones for their pets in the cemetery alongside the rest of our deceased relatives? The whole thing is just stupid and destructive. That’s the sort of thing that people do that CAN’T have children.
They’ll regret the hell out of this when they’re 85 years old and don’t have anyone to care for them. Their Chihuahua sure as hell isn’t gonna be there to do it!