1.  Birds that do not kit well.

     You will develope a team of none kitting birds.

2.  Slow spinning birds, poor velocity.

     Velocity is very hard or impossible to add if you don't have it to start with.

3.  Poor quality birds,  not rolling straight, not returning directly to the kit, slow coming out of the roll, etc.

4.  True roll downs.

5.  Birds with poor eye sight.

6.  Long keeled birds.

7.  Alond Cock & Alond Hen together,  too many eye defects.