Sorry if this has been suggested before or anything, I couldn't see anything about it.

So I'm suggestion there be another option added to the dog search, something like this.

'Training completed' with 4 options?
'0-24%'
'25-49%'
'50-74%'
75-100%'

Just thought I'd suggest this cause it gets a bit frustrating when I'm trying to find studs and stuff.