Small dogs are always the worst trained I come across
That pupper needs some training
That pupper needs proper restraining, and not by its human.
Even the best trained dogs don’t respond well to being jabbed/poked/prodded (and this is not how you trim toenails, you get them down on a table or on your lap).
Source: frequently assisted a vet friend when techs were unavailable, it’s a very rare animal that will tolerate being jabbed, having blood drawn, even just being shaved for an IV. (Actually I’ve never seen it, unless they were mortally ill).
It’s unfamiliar to them, so they react by protecting themselves.
(Edit: this dog, like 98% of them, are poorly socialized/trained in general, which I find very frustrating. People are lazy, complacent shits when it comes to learning about dogs before they get one. And most can’t be bothered to do the work required).
We’ve associated nail trimming with positive rewards since our 5 month old puppy was around 8 weeks old, so he’s pretty chill about it. He’ll let you trim 3 feet without any issues. On the 4th foot he’s pretty much done with our shit and starts pulling away, but he does let us do it. We just put him on a special table that is used for grooming him, and he sits there and lets us do his nails. He’s also pretty ambivalent to shots, but again, we’ve always done everything we can to make these positive experiences for him, with lots of treats and praise. Brushing his teeth is equally as chill. It usually comes down to exposing the pupper to these things at a young age and making it an overall positive experience. He also went through a professional puppy socialization class for 6 weeks, to make sure he’s cool with people and other dogs, since he’s going to be a large and powerful dog when he’s fully grown. He goes into advanced obedience training class in 2 weeks!
Meanwhile my lab will ask for his ears cleaned and butt squeezes. He will point at his butt and then look at us and then do that over and over until we ask if that’s what he wants and then prance around because we got it right. As for ears he will shake his head and then go nose the bottle of ear cleaner. Nails is another story, he won’t ask but when we do it he falls asleep.