The Ferndale-based pet product manufacturer Healthy Pet has purchased a natural, wood-based cat-litter brand called Simply Pine, and company leaders said the acquisition will accelerate the firm’s expansion into the natural fiber cat-litter market.

Healthy Pet acquired the Simply Pine brand from Dry Creek Products LLC, a subsidiary of Biomaxx Inc. Along with the sale, both companies have entered a multi-year agreement that will have Dry Creek supply products to Healthy Pet. Financial terms of the deal were not disclosed.

Simply Pine products are sold in more than 1,500 retail locations nationwide.

Healthy Pet was founded more than 25 years ago as Absorption Corp. It is today a division of J. Rettenmaier & Sohne.