I haven't heard back from anyone yet as to whether or not this cheat helps with this problem, but seems worth a try.
From
Crinrict's Sims 4 Help Blog:
This cheat removes all moodlets the animal currently has.
Warning! Don’t use this when your dog is pregnant.
Open the cheat console with ctl-shift-c
Type testingcheats on
Type sims.get_sim_id_by_name
, to get the ID of the pet
Write down the ID. It’s a long one.
Type sims.remove_all_buffs (ID is the number you wrote down)
Close the console with ctl-shift-c
Edited to add: wait a minute, didn't I recently read that the buff cheats (add or remove) have been taken away? Apologies, then; this won't work if the cheat's no longer available to us. Worth noting in the feedback thread about the cheat-nerf that players won't be able to get interim workarounds on bugs like this when they've removed the cheat.
