We can help you with dosing if you need it. All we will need is his weight in grams and the size of the pill you get in milligrams. Cipro is available in both 250mg and 500mg sizes. You will need a 1cc syringe to dose it.
We need to get you to switch formulas. Order a bag of this:
https://www.henryspets.com/fox-valle...aby-squirrels/ and when it comes in you will need to SLOWLY transition him over to it. The Pet Ag stuff is not a good formula.
While you are at the Henry's site, order some syringes. The O-ring feeding syringes will not stick like the one you have. Until you get them, pull the plunger out amnd rub some vegetable oil on the black rubber part - it will help it slide easier.
Also, it is getting very close to the time you will want to start offering him solid food IN ADDITION to his formula. At the same site, pick up a bag or two of this:
https://www.henryspets.com/squirrel-diet/ Get either the hazelnut or the picky blocks - or one of each.
Baby squirrels sneeze and sniff a lot. They are sniffing and smelling everything because it is all new and make lots of little mouth noises and pfffts. Normally, aspiration pneumonia shows clicking IN THE CHEST with every breath, lethargy, and appetite disappears.