hartz product not working secaucus New Jersey

 i have 2 dogs and 1 cat. I used hartz tropical flea and tick prevention. kills fleas, brown dog ticks,deer ticks.I put it on them on oct 25th 2013,this is nov. 3rd and each time they have came in I find and have to remove ticks. one of my dogs had 3 ticks on her that I removed all at the same time. my cat also has been comming in with ticks. my cat is 10 years old and my dogs are 4 years old. none of my pets ever had this happen. I always every month used prevention but a diffrent brand. I am afraid to let my pets outside now. they only have to be out 3 to 5 min. and they come in with ticks. I am sick of this.I try very hard to take care of my pets and this is what I get from Hartz.. I will be going back to me oringinal product that I know works. my poor pets having to have this happen to them.Hartz should be ashamed of themselves...