That sounds like my guinea pig Beavis! he was the runt and was being bullied at the pet shop by his siblings. I felt bad for him, so chose him and he was the loveliest guinea pig ever and lived a long happy life, even my Dad adored him. We were so sad when he passed away but so glad we had him in our lives.My cocker spaniel was the runt of her litter- she was the only one left and had been bullied by her brothers and sisters. She was the most lovely pet with the sweetest personality and lived till she was 15. I'd say runts rule!