Cat Ate Cactus Top, Now Yellow/Soft: Cut Top, But Rest Rotting—Likely Dead

Month Ago Cat Ate Top, Cactus Yellow/Soft, Cut Top, Rest Turning Soft/Yellow

Owner asks what to do.

If Fully Involved, Nothing Works

Greg: could be heat exposure or rot (usually bottom-up). Check soil: if wet, don't water till dry. If dry, when last watered? Cacti need more than teaspoon/month. Water if dry long time—may help. But likely dead.