I find it a hassle when pet stores refuse to stock flea and tick supplies year round. PetCo used to stock these items year round but for the past couple years I have found that by the time fall rolls around they no longer stock items like Advantage. I understand that fleas aren't usually a problem during winter months but it would help if they keep them in stock up through November, afterall there are times that the weather is warm enough for fleas and ticks until the first freeze of the season. Theres also the issue of my local Petco not stocking a full line of ferret supplies any longer but thats another story.
PROS: Decent prices
CONS: not enough supplies in stock