I would guess that Daisy's "puppy liscense" is about to expire. Usually between 4 and 5 months, the adult dogs don't accept inappropriate behavior anymore. And they get on the puppies to "grow up and knock it off"
We are going thru that here too. Our problem is that Ivy is very sensitive to anyone having more fun than she is…she a very low tolerance for silliness....so you can imagine how she feels about uppity young puppies! So she reprimands Ariel...and Ariel says 'oh, yeah...scr*w you!!!' And then it sounds like world war III is about to break out..until I soothe all feelings. I would video tape it if I could, so you could see what it looks like just before a real fight...but then I couldn't intervene
The other adults just complain to her, and about her...but don't really take it to defcon four...Ivy, OTOH...well...she is truly an alpha bitch....in every bad sense of the world.
Sometimes Duke might need a break from Daisy...if you can separate them briefly, it might help.