My first half dozen tomatoes should be ready this weekend for Caprese Salad for Fathers Day. However, two of my plants were attacked by some vermin this week. I normally keeps my tomatoes fenced in to keep the woodland creatures out. My fence was not totally up this year while I was convalescing from my knee replacement. It's up now.
The photo shows that something ate the core of the stalk from ground level to a foot above the ground. I'm thinking mice, rats, opossums, or rabbits.