Is this cydectin as a drench or an injectable?
In general oral drenches are preferred as wormers for goats, there is whole page on the reasons in the John Matthews book (no time to discuss it now). If drench ivermectins are 2x the sheep dose, it would be adbisable to weight your goats, as it is really difficult to gauge their weight by just looking at them.
I have never used Hexasol yet, my vet gives flunixin and the required AB separately, I have used oxytetracycline and flunixin in the past, but maybe you want to check with your vet again. The one AB that I know is toxic for goats is tilmicosin phosphate (micotil is the main drug in the UK, but there will be other ones with it in). There was a recent discussion about it on Facebook.