Your in Texas - How far is it to Mexico? $800/person, Mexico prices, no narcotics as the US doggies get excited.
DW works the system and usually has a 6 month supply within the expiration dates.
We've also had them mailed to family members or a pharmacy.
We go to Yuma, park at the Native American parking lot for $6, walk to the Purple Pharmacy in Algodones, fill their purple shopping bags, return and the doggies are bored.
And this is all about avoiding the **** donut hole - as I said DW works the system.