Senior dog nighttime anxiety & cognitive decline

Nighttime restlessness appearing for the first time in an 11-year-old Beardie is really worth taking seriously — when anxiety like this is new in a senior dog, cognitive dysfunction syndrome (CDS) is often part of the picture, and it changes how you approach things. Separation anxiety is already hard on both of you, but when it's tangled up with cognitive decline it can feel especially helpless. Products can genuinely ease the distress, but they work best alongside a vet conversation and some environmental adjustments. Before I point you in the right direction — can you tell me a bit more? Specifically: is he worse at night even when you're home, or only when he's left alone? And has your vet mentioned cognitive dysfunction, or is that something you're suspecting yourself based on what you're seeing?

That pattern — fine for years, then suddenly unsettled at night when separated — is really classic early CDS. Their internal clock gets disrupted, they lose that background sense of where they are and where you are, and the darkness makes it worse. The good news is that at the 'monitoring' stage your vet is describing, there's a lot you can do without waiting. One more quick question: have you tried anything so far — a plug-in diffuser, keeping a light on, letting him sleep closer to you — and did any of it help at all, even partially?

The fact that Adaptil helped a little tells me his nervous system is responsive to that kind of support — which is actually a good sign. The problem with Adaptil alone for CDS-linked anxiety is that it's addressing the stress response, but not the underlying cognitive piece. That's where I'd add Zylkene into the mix. It's a casein-based supplement — derived from a protein in milk — that has solid evidence for anxiety in older dogs, and specifically there's research on it helping dogs with age-related behavioural changes. It works on the same receptors as some anti-anxiety medications but without sedation, and it won't interact with anything your vet might decide to prescribe later. You give it once daily in a capsule you can open over food. Vetoquinol make it and it's available in a 30-capsule box of 450mg on Amazon UK — that's the right dose for a Bearded Collie at around 20–30kg. I'd give it 3–4 weeks to build up properly before judging it. Keep the door-open arrangement and the radio going alongside it — those small environmental anchors genuinely matter for dogs losing spatial confidence.

Honestly, with suspected CDS it's likely to be long-term — the cognitive changes don't reverse, so the support works best when it's continuous rather than on-and-off. That said, it's not a commitment you can't revisit. Some owners find that once they've got the environment dialled in and the dog settles into a new routine, they can reduce the dose under vet guidance. But for now, treating it as an ongoing daily supplement rather than a short course is the right mindset. And do loop your vet in — if things don't improve meaningfully in a month, there are prescription options like Selgian (selegiline) specifically licensed for CDS in dogs that are worth discussing. You're not at that point yet, but it's useful to know the path forward if you need it.

That sounds like exactly the right plan. When you speak to the vet, it's worth asking them to do a full cognitive dysfunction assessment — there are standardised questionnaires they can use that help track progression over time, which is useful to have documented. Wishing your old boy more settled nights soon — Bearded Collies are brilliant dogs and he's lucky to have someone paying this much attention to what's changed for him.