Task: Assess the emotional content of the tweet and classify it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best represent the tweeter's mental state.
Tweet: Heart heavy for lost furry family members. Remembering Max and Ozzie. Forever friends as 🐶😇
This tweet contains emotions: 
sadness