
Doing "sub q" as the americans call it is very much an american thing -the slightest problem in any animals (even down to hamsters) and they do it themselves. It's a big thing with cats with kidney problems for instance, americans tend to give the fluids at home twice a day, but UK vets consider it nothing but cruel generally speaking (i.e. wen it is on a permanent basis).
I think not a lot of people in the UK would do something like this themselves if for no other reason than that it would be hard to ge hold of supplies as vets don't hand them out here like they do in the US.
As for vets not being very interested in young puppies- bit of a sweeping statement isn't it? For instance I took an 8 day old kitten to the vet on Friday and he got a very careful examination and antibiotics prescribed etc. With my litter of pups last year I took a pup in to be PTS as I considered it to have no chance of survival and turning into a normal healthy dog (long story) and the vet I saw then actually tried to convince me to not give up. So my experience has been the total opposite. I've often brought newborn kittens to the vet and they've never been uninterested in them. The only time my vet was disapproving and a bit dismissive was when I brought in a litter of accidental crossbred pups -BECAUSE they were crossbred. In his words "They're just mutts, you'll never find GOOD homes for them all." Can't say I disagree with his attitude as he'd be the same with Joe Bloggs down the road who breeds a mongrel litter just becase they can without having thought it through.