going off of the little werewolf ask (I'm a different anon)
what if their werewolf transformations are in a cycle with the moon, but it's a bit irregular as to when, during that time frame, the little might actually be in wolf form. but their wolf form is pretty well trained. its the pre-transformation behaviors that are the most difficult to deal with.
for about a week before they're due to transform, this little werewolf will have a strong instinct to scent mark, among other dog-like behaviors. and their CG's first indication that this has begun is usually an "accident" of some sort.
maybe CG thinks their little has come home from work still big, but then they squat and start to pee through their pants onto the floor (in their favorite scent marking spot) and CG knows it's time to diaper them up.
or maybe, CG goes to diaper them normally, but little one already has a damp crotch when CG takes their pants down, still warm from having just re-wet the spot, and in the same way that an actual puppy might dribble from excitement, their little starts to dampen the changing mat (or their belly, if little has a penis). and if CG rubs their tummy? they'll start to go pee right away!
or maybe CG is too smart about tracking their little's moon cycle, and has them diapered, even when they're big, days before this starts... but little has also gotten really good at sneaking off somewhere private, ripping and tearing at their diaper until they've gotten it off, and then peeing on something that belongs to CG, because their CG is their favorite, and they want to mark their favorite person as theirs, so so so badly!!!
also, I love imagining that werewolves, when they're in this particular phase, actually physically have an overactive bladder. they have a much looser hold on their pee, and their bladder tends to produce more urine consistently. so instead of their bladder filling until they release it, they just kind of dribble all day. it's worst the day before they change... on that day, they're basically completely incontinent. they can hold in small bits during earlier days, but the biological function is clearly so that they can constantly be scent marking their territory. if little is home on their own when this starts, they'll rip their diaper up, trying to get it off... trying to hold their pee, until they can get it off and purposefully go on something... but they piss themselves in the damaged diaper before they can get it fully removed, leaving them sitting in a medium sized puddle. only 15 minutes later, they lift their leg against a wall and... fssssssssssstt! a little jet of pee comes out, only for a few seconds, and then they're done. they feel like they're about to pee themselves a few minutes later... they gotta go so bad! they go over to their CG's shoes, wiggle their hips a little, then choose one and squat. just a tiny pshhhhsssssssssss... and... they're done again. then they go snuggle in CG's bed, where their scent is strongest. every time they put their nose in the pillow and remember their CG's presence, a little trickle starts running over their thigh and onto the mattress, like a tiny river... only to stop a moment later. they do this in the bed like five times before their CG gets back from the grocery store and realizes what a bad little puppy they have on their hands! but... little one just lit up as soon as CG came in the door... they were so wiggly, and all excited... and they rolled over, showed their tummy, and made the cutest little puddle, right at CG's feet. it's hard to stay mad when your puppy acts like this.
Oh goodness, what a mischievous little pup! Although it's not reeeaaally pup's fault, it's just how werewolves are, they can't help what their instincts tell them to do! But that doesn't save CG's things from getting all ruined... Someone needs a lockable diaper cover!