
The tattooist I use travels to Bristol to me from south Wales. She always gives me excellent results which I think is the most important thing with tattoos. I can even read my dogs tattoos off photos.
The tattooing doesn't take long and what the pups object to if at all is being held tightly to ensure they don't move at the critical moment. The actual Calipers being closed and then the ink being rubbed in takes seconds, and the latter part is soothing for the pup. The other pups will be on the floor trying to climb up to see what is happening, and the tattooed one will do the same once pup on the floor.
The whole thing is really only traumatic to a sensitive owner, but it really is no different to ear piercing done by gun.
I always hold my own pups (the tattooist has to have a competent assistant) as she trusts me to do ti right without being squeamish.
PM me if you want her details.
As for the T touch I expect that might be useful before or after, but not during.