I normally have a flea treatment auto filled every 3 months ,when what I get became backordered ( supply issues ,I'm told) I was offered a comparable product that was a little more money at no extra charge!Ive been getting this flea treatment (stronghold) for a group of colony cats for about 2 yrs now, if it wasn't for the reasonable cost I wouldn't be able to do this for them. Sometimes its slightly late (i'm sure because of travel issues) but there is always a follow up on Petbucket side to make sure of delivery- I'm very satisfied with them