I have 3 types of chemicals that I have on hand. DE, Chlorpyrifos 0.5% in dust form (the chemical is listed under DURSBAN brand), and carbaryl 22.5% this is the same stuff as Sevin dust but liquid and concentrated. They do for sure have lice and lots of eggs . I have them locked up so I can treat them in the morning but if this stuff is NOT SAFE for them I will go and get some Sevin dust tomorrow. Plz let me know if you need more info on these chemicals and thank you in advanced!!