Hard to explain!

You know when you bite the inside of your lip where it rests on the gap between top and lower teeth???
My girls have it like a line of bitten lip from canine to canine both my girls have it but blondy's seems to be more protruded, again so hard to explain it kinda reminds me of when i got my tongue pierced and my tongue was so swollen it pushed up agaisnt my teeth and i had the inpressions the inside of my teeth on my tongue, so with my girls i don't think its like bites but more their lips are too heavy and push agaisnt the gap between upper and lower teeth or their sucking their lip in, ok none of this makes sense but if anyone does know anything or even understand it could you let me know please?

I think I know what you mean.On my upper lip there is a permanent line from my teeth. You can't really see it, but I can feel it with my tongue. Don't think there is much that can be done about it, it's just the way my mouth is.

I think Christina's right, it's just the way they're built. As long as there aren't any sores etc, I wouldn't worry about it - they still look absolutely gorgeous!

Could just be the way their jaw is alligned such as an overbite or underbite. Nothing to worry about unless it is to the point it is causing a medical issue.

Tali is the same, its almost as though her teeth are too big for her mouth.

I thought it may be their teeth not being alined but that is not the case their teeth are perfect in shape and alinement they got a good bite motion, its not inflamed or anything or sore so i guess its nothing to worry about, thanks

Could it be the jack russel terrier in them they have a more sharper muzzle and maybe due to having mix in them the lips are tighter?