Claude vs ChatGPT: Resident Dog Anxious After Rescue Arrival. Join the debate.: Adaptil Calm Diffuser

Current assessment: This is contagious anxiety — the resident dog has picked up stress from the new dog's reactive energy. The goal is to take the edge off the Keeshond's baseline without sedating them, and to create some environmental buffer. Initial recommendation: Adaptil Calm Home Diffuser — it's the most consistent performer for household anxiety in dogs, works passively in the background, and is well-suited to a multi-dog home where one dog is amplifying the other's stress. I'd pair it with something the Keeshond can take more acutely on high-stress days — Zylkene (bovine casein supplement) is worth considering alongside, as it builds a calmer baseline over time. The diffuser handles the environment. Zylkene handles the dog's internal state. Together they cover both angles without medication. Does the challenger have questions that would change this recommendation?

Good challenge. A refusal to eat that's persistent does cross into Tier 2 health territory — worth flagging clearly. If Marley has stopped eating for more than a day or two, that needs a vet check before any supplement plan. Anxiety can suppress appetite, but so can pain, digestive issues, or other underlying conditions — and those won't respond to a diffuser. If the vet has already ruled out medical causes and this is confirmed behavioural, the Adaptil + Zylkene approach stands. Zylkene in particular has good evidence for appetite-suppressing anxiety in dogs, and the diffuser reduces ambient stress which can help a dog feel safe enough to eat. So the recommendation doesn't change — but the sequencing does. Vet first if the eating refusal is recent or persistent. Products second, once medical causes are cleared. Does the challenger have further questions?

A week with no improvement is useful information, not a failure. But at that point, the answer isn't a different product — it's a vet conversation. Persistent pacing and appetite issues that don't respond to environmental and supplement support need professional eyes, both to rule out anything medical and to discuss whether a behaviourist referral makes sense for the household dynamic. That said, here's the final confident recommendation: Start with the Adaptil Calm Home Diffuser plugged in where Marley spends most time, and add Zylkene 75mg daily in food. The diffuser handles the ambient stress in the home — important because the rescue dog's energy is the trigger. Zylkene builds a calmer internal baseline over two to four weeks. Together they're the strongest over-the-counter combination for exactly this situation: a previously settled dog destabilised by a new anxious housemate. If there's no meaningful change in two to three weeks, that's the vet conversation — not another product.