I can't remember now what dose of Felimazole I had Trigger on, but I know I went down the small dose route too, and my vet was open to that - mind you, Trigger had not lost weight and was not really ill - just demanding food all the time
Bristol can mean waiting longer, Gill, as they are one of only two centres who will take cats with the rare thyroid cancer, which are always urgent cases
I had a lot of success with Felimazole in Webbox because I used to feed him sitting over him, so his head was raised and his throat tilted, meaning he swallowed the pieces whole , rather than bending down and nosing out the bits of pill