I endorse this message!
Anything that improves or adds interaction to the game is aces. New crops and stuff are neat, but new mechanics--like pets playing with each other, kids running around on the farm, (ahem) horse-drawn plough, new events--are really the things that give this game staying power. We all have different things we especially like, and things we're indifferent to, but I think ALL fans of Stardew are in love with the relationships--both to the valley and farm, and to the NPCs--that make the game special. :)
So yes, by Gar! Let's have multi-pet households! Let the dogs herd sheep, and frolic together. :)