The similarity with treatment to goats is the key I think, with cattle we found it's a whole different thing as they don't like being with the cattle, cattle bump them too much as they do etc.
Ours coped better at Hogarth Range but they had a shed there, which is still to be built here although they get under the verandah it was too hot on the 40 degree days and we'd move them out under trees for a breeze and next thing back they'd be in 'their' spot.
Our vet (he's been dealing with alpacas for about 20 years, everyone uses him for them) said they don't absorb the pour ons, as their skin is different. We've used injectable cydectin and dectomax injectable. Some say inject under the skin on the neck, but try to find that with confidence when they're woolly
the shearer said on the inside leg for all injections, there's no wool and if they get a lump from 5in1 which some do, it's doesn't catch on the shears when shearing... made sense to us, so that's where I do them now. DH grabs them, they go into cush and then we roll them carefully (making sure their necks aren't in a bad position, don't want to break them) and I inject them. As far as keeping in a paddock at the moment they have some steel posts with pink hay string keeping them in.
Ours were broken to halter but when we got them I'd had my finger broken (ended up with a hand specialist in Sydney with it) and found it difficult to keep up. I'm going to have to put the time in to future heifers though, especially to sell as house cows. I had a great opportunity with Fatima and she was okay for a bit but need to get a halter on her and retrain her. I need to learn how to make halters, then I can start with a light one and build it up... hmmm well that's what I was thinking, but we'll see.