Task: Categorize the tweet's emotional tone as either 'neutral or no emotion' or identify the presence of one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Heart heavy for lost furry family members. Remembering Max and Ozzie. Forever friends as 🐶😇
This tweet contains emotions: 
sadness