Medication
You're going to need to hold his head - gently but firmly. We have to be assertive, but not rough! Put the syringe in his mouth - they only have little mouths but you should be able to slip a small syringe in one side. It's important he gets his prescribed meds if the vet thinks he needs them. You're a lot bigger than he is and once you've got him in a tunnel or bag he really won't have much option. You could always try phoning the vet and seeing if they do a nurse appointment where the nurse can show you how to dose him. Give him a little treat
after so he knows it's not all nastiness! Poor lad is suffering and must feel scared about all this - they know they're vulnerable when they're ill and he must be in pain with his eyes and his feet x
Handling
Piggies are not really a cuddly pet. This is absolutely normal. They are a fearful little prey animal whose charm is in winning their trust. Hubs put it well when he said their thought process is, "Here they come, I'm going to die... I'm going to
die... I'M GOING TO
DIE... Ooh, lettuce!" We were about 10 pigs in before we got one that came up to him and let him have a little fuss. He said, "Finally! A pet you can pet!" My 3 are loose in the kitchen which you might think is madness but the truth is they stick to their bit and rarely come out further - until someone opens the fridge
It's always possible they are not the ideal pet for you but try and separate that thought from the immediate problem of looking after your poorly one. If you can get him better you can consider your options. Sometimes our circumstances change and we find ourselves unable to do our best for our little guys. If you have a look on the Guinea Lynx rescue page
Guinea Lynx :: US Guinea Pig Rescue and Shelter Organizations there seems to be a couple in in NJ including one in Florence which might be closer to you? If you can get through to one they might have word-of-mouth contacts at other places.