I hope the vet can take care of them in some noninvasive way.
I wonder if there is something that can shrink them? I don't
think I would opt for the surgery because it is so invasive,
their little sinuses are so small--and the damned things always
grow back. It is the same with humans. My father put off
having the surgery done from age 19 when they first told him
he had to have it to age 60. He had it done, and the things
grew back within two years. One thing--they made him
lose his sense of smell. I don't know if that happens with
cats, but it is something to ask your vet about, as I
understand that may put a cat off of eating. Good
luck. Poor Boots.