Hi, I am a bit behind in my FMLs and hope I'm not too late in getting this info out. I have also heard boric acid is harmless, however, I recently almost lost my ferret Rascal after he inhaled some left over residue that I did not see until it was too late. I had my house treated for centipedes, and was told by the exterminating company what they were putting in the cracks & crevices in my home was safe for my pets (one of the ingredients was boric acid). Unfortunately I had to have the ferret room treated as that is the main place where (VERY LARGE) centipedes were getting in and I was afraid of any reactions the ferrets could have should they get bitten by one. To make a long story short, Rascal, almost 3rs old, INHALED some boric acid that apparently seeped back out through the baseboards. Within 24 hours, he went into SEVERE respiratory distress with very limited lung capacity and had to be hospitalized under 24 hour care for 9 days, 8 of those days on oxygen as well as a special medical protocol. No one thought he would make it, but I am so very grateful he did pull through and is almost completely recovered. This was a very scary and heart-breaking incident and I would not want any one else to have their babies go through what mine did. So please be VERY careful, and make sure NO RESIDUE can make contact with your babies (you can neutralize it with just soap & water). All the best, Tracy (& Rascal *the Miracle Ferret* & Cocoa) [Posted in FML issue 3230]