I have used the Bayer tree and Shrub, as well as the Termidor. I am not sure about the Termidor shelf life. It worked really well the first half of the bottle and in time it did not seem to be doing the trick. I won' throw that off on the product. Here in NC the fleas (and ticks) come in waves and in patches. I use the termidor as a spray and treat the yard and surrounding areas around the dogs. I can have all the dogs flea and tick free and then one will pop up with fleas out the ying yang. I clean the box, move the box, treat the area, clean the dog, re-treat the dog and all is well. Next week/next month another may or may not pop up.

Here in NC it rains, then it gets hot and the humidity jumps creating nature's own little incubator for the fleas. It is a constant battle.

The termidor is tough to apply as it does not readily adhere/absorb to the dog. I use a syringe but a rubber glove as well and try to rub it in as best I can. Year before last it worked wonders. This past summer was really wet. The humidity ramped with the temperature so it appeared the Termidor did not work as well. I think it was more the environment. EWO