Now granted, she learned several tricks early at like 3 months old. But teaching her to stay took around a year. Now I have up after 5 months of trying but swung at the trick off and on till one day, voula, she got it. Once they learn it, keep it up at least weekly if possible.
Also physically...
At first it was just sticks from the yard, they were kinda soft ones, not supper hard. I think when she was around 6 to 8 months we got her rawhide from Tractor supply. Pig ears worked for a bit. She won't chew milk bones for some reason. The first six months were a rollercoaster of training...
When our girl is starring at me or the wife and the other one calls on her....she moves her eyes in that direction but doesn't move her head. Makes us giggle every time.