One newsfeed I got said the dog carrier was sticking out in the aisle so the FA asked the passenger to put it in the overhead bin.

Did the passenger even tell the FA there was a dog in this carrier ? FA can be abrupt during boarding "ma'am this bag will have to go overhead, it cannot stick out in the aisle" then turning quickly to move on down the aisle to do whatever needs to be done next, without a 2nd thought.

Are those big dogs ? (Guess it depends on the age) Would it be a struggle to lift and put into an overhead bin while maintaining control of a lap child ? Dogs move around too....legs, head, body....while being hoisted overhead.