I don't have dogs, but I have house plants that are turning a year old soon. Plants are basically pets and pets are basically people so plants are basically people, right? Right? I have this one that came in a pot about double the size of a coffee mug and now it has branches that are almost as tall as me. That little guy grew big, fast. Anyway, I am celebrating with bigger pots and new soil. Maybe you could repot your dogs into a bigger pillow or doghouse.