The 3-3-3 rule — and how to use it when your rescue won’t eat.

The first time I brought a rescue dog home, I did almost everything wrong. I introduced her to the neighbour. I took her on a four-kilometre walk because I thought she needed to "burn off energy." I let three different people pet her in the same afternoon. By bedtime she had eaten nothing, drunk almost nothing, and was hiding under the couch — which, in fairness, was the smartest thing anyone in the house had done all day.

What I didn't know — what most new rescue owners don't know — is that there's a well-documented timeline for how dogs decompress after a move. Shelter staff and behaviourists call it the 3-3-3 rule: three days, three weeks, three months. Each phase looks different. Each phase needs something different from you.

This piece walks through each stage with what I see in my clinic, what the research says, and what to actually do. It's the conversation I wish someone had sat me down for before I brought Sasha home.

Decompression

A dog who just arrived in your home is, neurochemically, running a stress response. Cortisol is elevated. Translation: they cannot learn anything right now. They cannot bond with you right now. Their entire system is in survey mode: where am I, what is this, is it safe.

What this looks like at home: they sleep a lot. A lot. Eighteen hours is normal. They might not eat for the first 24 hours. None of this is a problem. All of it is the system doing exactly what it should.

The most common reason new owners "fail" is that they treat day three the way they think they should treat month three.— Dr. Petra Kovač, DVM

Settling

Around day four or five something shifts. They eat a real meal. They take a toy off the floor. This is the beginning of the second phase, and it is when most owners make their first big mistake — which is to assume the dog they're meeting is the dog they've adopted.

They're not, yet. What you're seeing is a personality emerging from a stress shell. It will keep emerging for another two to three weeks. Hold the line on routine. Stay boring. Take notes about what triggers him, when he eats, when he sleeps. You'll need them in month two.

Bonding

The third stage is the one nobody warns you about, because by then you assume the work is done. It isn't. Around week four, a dog who has finally relaxed will start testing — gently, but unmistakably — the boundaries of this new life.

• They didn't rush socialisation. New dogs were met outside on a walk, not in the living room.
• They started training in week three, not week one. Short, calm, well-paid sessions.
• They didn't apologise for their dog. A dog who senses you're embarrassed of him learns to brace for trouble.

Three mistakes to avoid

1. The welcome party. Two weeks, minimum, of household-only contact.
2. The big walk. "He needs to burn off energy" is the most expensive instinct in dog ownership. He needs to sleep.
3. The early correction. Punishing a dog who is still in stress shell teaches them that this new place is also unsafe. Wait.

Tools we actually use

A long-line (10 m, biothane, not retractable). A snuffle mat. A KONG that fits their mouth. A crate big enough to stand and turn around in, not bigger. Plain boiled chicken in the freezer in 50-gram portions. That's it.