Sick Life saving advice-vet mistakes-syringe feeding

After reading on the forums here for my three little guys I realized that they had URIs. I took them to the vet as soon as I could after realizing this, thinking the problem would be solved after I got my antibiotics. I received the drugs and came home. As I filled the syringe I realized that the name of the drug looked familiar and took to GL. To my shock I found that the medications I had been given were lethal to my poor piggies. I called the vet upon noticing this and they said that it would be fine, go ahead and give it to them. Maybe 6 minutes later they called back frantically telling me not to give them the medication, they had made a mistake. Fortunatly I knew better and hadn't given them anything so they are doing okay for now.

Word of advice is to always check meds before you give them, guys.

To those who read this I would also like to know if it would be wise to give my sickest pig, who weighs 20 grams less than his brother who is smaller than him in stature but the same age, a few syringe fulls of mushed pellets tonight. I'm scared he isn't eating enough and I really don't want him to get scurvy on top of his infection.

Thanks for reading and any advice. And always keep in mind that sometimes even the best vets make mistakes!