Yes. Sulphur works, we have copperheads here, we purchased sulphur at the local hardware in a small town and spread it around the house and then around the flower beds and outer yard. We have 6 acres and oak trees, 50 pecan trees, fruit trees etc. But mainly around our house.. Last year we acquired 4 cats and this will be their lst year to see what they will do. I am told they will kill a varment and bring it to let you see??? we shall see??? We ususally kill appx 2 or 3 per year, but I am told they only have littleones every 3 yrs. --not sure on that either. When we were kids we used to sulphur the entire yards and fields but now you can't get that much do to ------bombers. So we make due with the 1 lbs we manage to get. I like living in the country, its quiet.