I switched my cat to Prozinc a few weeks ago and went with Chewy. He was on Vetsulin and I was getting it from the vet ($58 for insulin and $18 for syringes). I ordered the Prozinc and syringes from Chewy and with free shipping and a coupon code my total was $101. A few days after ordering I got an email from them saying that they did not get a response from my vet. I did a little go between from the vet and Chewy and they had the prescription by that afternoon. The very next day around 12:00 pm the box arrived. Everything was packaged so well! The insulin was in a cooler with an ice pack. The package even came with a coupon for $20 off if I order again before August. The biggest hold up was the correspondence with the vet, other than that I like the prices and the customer service.