difference between vet and discount store

[bkfizz]

Is there a big difference between the flea/tick serums (the kind you put between the shoulder blades) from discount stores and the vet? thanks

[bkfizz]

i just went to the vet and got frontline. thanks

[nylira]

Can Cosequin medication and/or Prescription Diet k/d food be obtained somewhere besides the veterinarian, at a reasonable price??

I'm talking about other than online, or if online, where you don't have to purchase umpteen jillion dollars worth in order to get FREE shipping!