I have read with heartache what has happened to so many poor animals as a result of this poisonous product. I have had similar bad reactions from flea & tick shampoos, especially with my elderly dogs.
Any more, I rely on an old tried-an-true product that I used to use years ago and had a bit of a hard time finding again. Didn't have any problems w/ fleas & ticks for years until recently when we have had an invasion of racoons who must be dropping them and passing them on to my 3 dogs, one of whom is a 19 year old terrier/Lhasa mix, so I am very cautious as to what I use. I have started bathing all 3 (a pit mix, a Rottie mix, and the terrier) every week with mild shampoo, and then I spray them lightly with Adams Flea & Tick Spray. It has really been working well this summer, after experiencing the nightmare of last summer's tick invasion.
I have never had any bad reactions from this product, it is pretty effective, smells OK, and also repels mosquitos, which is helpful. I hope this advice helps some of you as I think it is a pretty safe alternative. The down side is that it takes more effort to do this weekly, but my critters are worth it and I am sure you feel the same way about yours. Unfortunately, alot of the spot on products seem very harmful and designed only to make life EASIER for us humans and more profitable for the vets and drug companies.
Not so great for our canine buddies. (Oh, by the way, Adams works for cats, too!)
Product or Service Mentioned: Ceva Animal Health Flea Control.