I Have 3 Yorkies I bought 2 the same age a wk apart and one was 2 pds when the other was 5 pds the 5pd always played way to ruff and hard on the baby,but now they love each other. they play great most of the time now. at first the 2 pd zip would cry all the time when the big guy came by him was afraid of him now all 3 are doing great with little break up at times. been 2 months.It is cute to watch now zip follows tyke the big guy all around the house give it time |