according to Frontline's website FAQ question #7 states: FRONTLINE Brand Products do not carry an expiration date. We recommend storing FRONTLINE Brand Products at room temperature and keeping them sealed in their original packaging. If stored under these conditions, FRONTINE Brand Products will not expire.

If my dog is 22 do I buy up to 22 or go to the second category 23 up?

I am in the same situation. I have found that the smaller dose is not effective. But the 23 and up does the trick.

Yes, but the product must dry before a bath or swimming. “Waterproof” is also listed on the front of package.

Does it actually work ?

We've used this product in the past and it worked, and we live on a corner and have our dogs in the country and camping in wooded areas. If I remember correctly, it won't kill adult fleas, but prevents them from reproducing and I believe the nuts as well. If there's an infestation, or a source of fleas nearby, even a neighbor animal, that doesn't have the flea problem addressed, the flea cycle will continue.

ASIN	B0002J1FN0
Active Ingredients	Fipronil
Best Sellers Rank	#44,773 in Pet Supplies ( See Top 100 in Pet Supplies ) #55 in Dog Flea Drops
Brand	Frontline
Brand Name	Frontline
Customer Reviews	4.4 out of 5 stars 14,905 Reviews
Item Form	oil
Item Weight	1 Ounces
Item form	oil
Item volume	0.14 Fluid Ounces
Item weight	1 Ounces
Manufacturer	Frontline
Manufacturer Part Number	P004FLTSP-23-44
Model Number	P004FLTSP-23-44
Scent	Unscented
Scent Name	Unscented
UPC	816306017808 717077000641 742583966532 788995790150 793591599939 891962001071 350604401315 705105831718 643996060353 350604287100 611102267675 078997022220 010756261372
Unit Count	3 Count
Volume	0.14 Fluid Ounces

Frontline plus blue 23-44lb med 3pk

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