I have been using clay cat litter for years without issue. I put a layer down and then aspen on top. Works wonders and have never had an issue yet. I have 20 tubs with 3 girls (+litters ) and can go a week before I can smell them (this is in a garage with little ventilation)


But you can also just clean them more frequently...I have never had any issues with touching or moving babies even right after they were born.