Having read Bumblebear's other post about Streptacare, it does seem a complicated antibiotic to administer. Our vet gives us Betamox; with that you only need to do more than one injection site at a time if the dose is over 20 ml, ie. 200 kg bodyweight, but my pigs who got it were max. 30 kg weigh (requiring a 3 ml dose). I always ask for a whole bottle of antibiotic rather than single doses, just in case it, or something else, crops up again, or in another pig. You can use it for 28 days after first piercing the bottle lid. We gave ours two jabs in total, 48 hours apart, and that seemed to sort it out completely, with no recurrence of symptoms or high temperature. SO FAR AT LEAST !!!