Hi
HUGS
I am very sorry that you are struggling a good vet. Sadly, guinea pigs still don't feature much on a general vet's curriculum because they are classed as exotics.
Bordetella only needs to be considered if you:
- Have a dog or had a visiting dog with kennel cough, or a dog within 3 days of a kennel cough jab in the same room as the piggies.
- Are keeping rabbits and guinea pigs together or next to each other (the recommendation is now to keep the two species in different rooms and always feed and clean piggy dishes and cages first and separately to rabbits (potential e.cuniculi transmission via rabbit food debris falling onto guinea pig dishes - it has happened to a member).
- Are keeping guinea pigs in a hutch that is open to wild rabbits.
If your boy has had mites of some sort (I assume hay rather than mange mites?) and the vet is poking an area that is still or has recently been tender/sensitive, then of course they will be more reluctant when touched or prodded. The sides/abdomen are not one of the prime areas where piggies like to cuddled or stroked, generally, although there is an individual variance.
Please try to take a deep breath and see this as part of your individual learning experience. Some things we learn from by stumbling into them; you can never know everything.
For your learning process, you may find this guide here helpful:
Contagion - Inter-species Transmission and Pet Care During Owner Illness/Pregnancy (incl. Covid)