Needles and syringes are really cheap and its better to use a new 1 each time and that way you dont cross contaminate the other goats either. I always use new 1's when giving shots. Better safe than sorry any day...
OK, I am BAD. When I have a lot of goats to give shots to, I will use a syringe, and a needle. When I give the shot, I take off the needle and dispose of it in a Needled can that I mad, and I do use the syringe on the next goat. I will do that until I drop it or get blood or something like that. When I am done with all the goats, then I do dispose of it in the needle can also. I never use two different meds in it.
Now the ONLY reason I do this is my vet said that was OK to do as long as I do not drop it or it gets dirty. :shrug:
i re use my syringes but not my neeldes. I write on them so i only put one type of medicine in the, never mix it up. they may be cheap but when you are buying a lot of needles and syringes it can get expensive. A box of a hndred needles costs me twenty five dollars, i go through two to three boxes a year.