Crate training a Cavalier with a heart murmur

Crate training works when the crate becomes a genuinely positive space — and the right crate size and type matters more than most people realise, as does the introduction approach. With a dog who has a heart condition, the stakes around keeping stress low are real, not just nice-to-have. Before I point you anywhere specific: what breed and age is the dog, are you starting from scratch or trying to fix a bad association, and is this for home use or travel?

That's a really sensible approach from your vet — structured rest matters a lot with MVD in Cavaliers, and having a crate she genuinely settles in can make a real difference. The key thing I'd flag for her specifically: you want to avoid anything that triggers an anxious response during the introduction phase, because repeated stress spikes aren't what you want alongside a grade 3 murmur. Can I ask — does she have any existing safe spots she gravitates to at home, like a particular corner or a chair? And does she tend to be a nervous dog generally, or is she fairly settled in herself?

That's genuinely good news — a calm dog with no existing negative associations is the best possible starting point. What I'd recommend for her is the Ellie-Bo Deluxe Sloping Soft-sided Folding Dog Crate in a medium size. Here's why it fits her situation specifically: the soft fabric sides make the whole structure feel less visually imposing and more den-like than a wire crate, which tends to support that natural 'going to a quiet corner' instinct she already has. It's also lighter and quieter to set up — no metal clanging, no cold bars — which keeps the introduction calm from the first moment. You can position it right where her current bed is to begin with, put her familiar blanket inside, and let her investigate it over a few days with the door completely off before you ever close it. For a Cavalier at rest-management stage, the goal is that she chooses to go in, not that she tolerates being put in. The Ellie-Bo medium fits Cavaliers well — enough room to turn and lie stretched, not so much space that it loses that den feeling.

For a dog like her — calm temperament, no bad associations — you can often move through the stages in about one to two weeks without rushing it. Days one to three: crate is just there, door off, her bed or a worn t-shirt of yours inside. Let her sniff and enter on her own terms. Days four to seven: start dropping high-value treats just inside the entrance, then further back, so she's choosing to go in repeatedly. Once she's walking in confidently and lying down without any prompting, you add the door — closed but not latched first, then latched for a minute while you're right there, then gradually building duration. The golden rule with her heart condition: if she ever seems distressed, you go back a step immediately and slow the whole timeline down. Progress that sticks is always better than progress that creates a setback.

Keep it simple and familiar. A blanket or cushion she already uses is the single most effective thing — her own scent makes it immediately feel like hers rather than a new object. A worn item of your clothing helps too. Avoid anything that crinkles loudly or has unfamiliar textures at first. Once she's comfortable going in, you can add a long-lasting chew like a stuffed Kong to build a positive association with the door being closed — something that keeps her occupied and calm rather than alert. Skip any plug-in diffusers or sprays for now; they're fine tools but unnecessary when you have a naturally settled dog and a good introduction plan. The crate itself doing its job quietly is enough.