Deb, the vet told me the removal site would be about 1 inch diameter. The tumor is a black thing about the size of a pea. I bet it will probably be a larger chunk they excise. I'm having it done by laser, and hope this will mean faster and easier healing for Andy. He'll probably have to wear one of those collars after surgery as the site is within licking and chewing range. I just hope they get it all and he doesn't require further treatment. Thanks for your prayers and encouragement. Hopefully, my horse will never have to go through a similar treatment - thank goodness she's been an easy keeper so far.
Rita