@Annalynn Thanks for bringing this case! You mentioned that this poor pup suffers from anxiety. Is the anxiety only present at daycare? What are the associated behaviors (besides humping) that makes you say he’s anxious? Would he do better with a different group of dogs?
Humping can be an anxious behavior. So, adding any kind of punishment like scolding or spraying him away will only increase the anxiety. He may not be a good candidate for a high arousal environment like daycare.
Your options are limited if he remains in the group. If you can call him away before he starts humping, and give him someplace to relax away from the other dogs, he may learn that he can “ask” for a removal before he gets over threshold.
Yes, @virginiad we did talk about a product called Lust Buster, but that’s for male dogs who are obsessing over females in season. This sounds like a different situation. If considering adding any scent, I’d look toward a DAP collar or diffuser in that room to see if it calms him down.
@Annalynn Let us know what you try!