Harness v collar

[MellowshipSlinky]

Nelly is now 13 weeks old and so venturing outside.
Started lead training but we just get sit down protests until I unclip her, then off she goes..

It seems most people with these kind of dogs (Boston terrier etc) use a harness.

What concerns me is that whilst wearing a harness while lead training, if the harness isn’t comfortable then it’ll put her off.
I’ve now got 4 harnesses of different shapes and sizes but none fit that well.

So, my question is - should she be ok training just on the collar and when she’s big enough for a proper harness progress to that?

[Frenchda]

This post is rubbish with a gratuitous photo !

I used and still use both, harness mainly because its easier to grab them! A harness will not stop pulling.
Oh, a gratuitous pic