How to scale Google Ads spend profitably for a pet products store

Pet shoppers already buy online in large numbers, and they buy on a schedule. The figure above is Packaged Facts' estimate, as quoted in Chewy's annual report, that online shopping grew from 24% of US retail pet product sales in 2019 to an estimated 41% in 2025. The same report cites a Packaged Facts survey from January 2025 in which 49% of people buying pet products online had used an Autoship or subscription programme in the previous 12 months.

That changes how to scale. You are competing for customers who reorder, so the first order is only part of what a campaign buys. The sequence below scales on profit you can measure, without assuming loyalty you haven't seen.

1. Separate consumables and hard goods. Give food, treats and litter their own campaigns and targets, and do the same for toys, beds and accessories. Their margins after shipping are too different to share a target.

2. Price subscription acquisition on retention you have measured. In Recharge's subscription data, 96.2% of first-time pet supplies subscribers completed a first reorder, and 15.3% of the cohort reached a sixth. Use your own cohorts to work out what a new subscriber is worth over six months, and set the most you'll pay to acquire one from that.

   Illustrative arithmetic with made-up round numbers, not a benchmark.

   A new subscriber's first order earns $8 after shipping, and their reorders over the next six months earn $30 more. Break-even acquisition cost is $8 on the first order, or $38 over six months. Bid for the six-month figure only if your own cohorts reach it.

3. Exclude heavy, low-value orders. A single heavy item below your free-shipping threshold can cost more to ship than it earns. Exclude those products from campaigns, or only run them where the first order leads into a subscription. To find them, compare each product's shipping cost on a typical single-item order with its margin in dollars. Anything where shipping takes most of the margin needs a minimum basket, a bundle or a subscription before it's worth advertising.

4. Scale hard goods on their own targets. Toys, beds and accessories don't depend on a reorder to pay back, so they can be judged on first-order POAS alone and scaled when they clear it.

5. Use the category's momentum carefully. In Triple Whale's Google Ads benchmarks, Pets & Animals was the only industry whose median cost per acquisition fell over the year to July 2026, to $25.05. Falling costs make scaling tempting. Scale only the campaigns whose POAS after shipping clears your floor.

6. Check that new cohorts behave like old ones. Each month, look at whether subscribers acquired during a scaling push reorder at the same rate as earlier ones. If they don't, the extra budget reached less committed buyers, and your acquisition ceiling needs to come down.

What this looks like month to month

Review first-order POAS for hard goods weekly. Review subscriber cohorts monthly. Add budget where either clears its own target, and pull back where the cohorts stop holding up.