I have 3 dogs and 2 cats and am on disability, we are already having a bad flea problern this year and I cannot afford frontling. When I was at Dollar General shopping and saw the seargent for dogs for 5.oo, the worst I thought would happen is that it wouldnt work. When I woke up the nesxt morning my dog had sores and no hair in many area’s and my cat was the same way. I didn’t buy any for the cats but they sleep with the dogs. I cant afford to take them to the vet but got online and saw how many people have had the same problem and what really makes me mad is there is no warning, well that and they are still selling them, one of may cats is having spasms in his stomach so I don’t even know if he is going to survive. please help. Thanks: Jeffrey Scott Caldwell. p.s. my phone number is 205-202-3339, this is not a cell phone it is a home phone, Again thanks….