Skye is estimated a little over a year-a pointer mix. Zoie is probably the main instigator, she is around the same age and a bit smaller than Skye. Casey is 7 years old and a GSD...she will jump in after Zoie. And then Star is about a year old also, Lab mix, and she'll run around and bark and once in a while jump in. Romeo is 8 months old and sometimes will join in but he prefers not to. Boomer is 4 years old and sometimes not bother her, but occasionally he will. Sam is the oldest male and he dosen't join in. It seems the problem is with the females of the group.