I looked up to see if wet & forget is safe for pets and found a $5 rebate offer:
http://wetandforget.com/wet_and_foge...ar_rebate.html
For anyone wondering - they indicate it's pet safe once it dries (about 4 - 5 hours after application). We are planning on using it on our shed roof and our dogs frequent the area around the shed. Hopefully it is as safe as they claim!